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Weather In Boston For September: Temperature, Precipitation, Humidity & More

Discover the average temperature, rainfall, humidity, wind conditions, and sunlight hours in Boston for September. Get insights into extreme weather events and find packing tips for your trip.

Average Temperature in Boston for September

September in Boston brings a transition from the warmth of summer to the crispness of fall. As the season changes, so does the average temperature in this vibrant city. Let’s dive into the details of what you can expect during this time of the year.

Daily High Temperature

During September, Boston experiences a gradual decrease in daily high temperatures. At the beginning of the month, you can still enjoy the remnants of summer with highs reaching around 77°F (25°C). As the weeks progress, however, the mercury begins to drop, and by the end of the month, the average daily high temperature hovers around 68°F (20°C).

Daily Low Temperature

Just as the daily high temperatures begin to cool down, the daily low temperatures in Boston also exhibit a similar pattern. In the early days of September, the nights are still relatively mild, with lows around 62°F (17°C). Towards the end of the month, the cooler autumn air settles in, bringing nighttime temperatures down to an average low of 54°F (12°C).

In summary, September in Boston sees a transition from warm summer days to cooler fall weather. The daily high temperatures start around 77°F (25°C) and gradually decrease to approximately 68°F (20°C) by the end of the month. On the other hand, the daily low temperatures range from 62°F (17°C) at the beginning of the month to around 54°F (12°C) towards the end.

To help you visualize the temperature changes throughout September, here’s a table showcasing the average daily high and low temperatures:

Date Daily High Temperature (°F) Daily Low Temperature (°F)
September 1 77 62
September 10 73 58
September 20 69 55
September 30 68 54

As you can see, there is a gradual decline in both the daily high and low temperatures as the month progresses. This information can be helpful in planning your activities and choosing appropriate attire during your visit to Boston in September.

Now that we’ve explored the average temperature trends for September, let’s move on to the next section to uncover more insights about precipitation in Boston during this month.


Precipitation in Boston for September

September is a transitional month in Boston, characterized by changing weather patterns and the arrival of fall. Precipitation during this time can play a significant role in shaping the overall experience of the month. In this section, we will delve into the average rainfall and the number of rainy days in Boston during September, providing you with valuable insights to plan your activities accordingly.

Average Rainfall

The average rainfall in Boston during September varies, with the city receiving an average of X inches of rain throughout the month. This means that you can expect some wet weather during your stay, but it is not as prevalent as in the summer months. The rainfall is spread out over the course of the month, with occasional showers and drizzles contributing to the overall precipitation.

Number of Rainy Days

September in Boston typically experiences an average of Y rainy days, where rain is recorded for a significant part of the day. These rainy days are scattered throughout the month, providing intermittent breaks in between. It’s important to note that a rainy day does not necessarily mean a washout, as the rain intensity can vary from light showers to heavy downpours.

To help you visualize the distribution of rainfall in Boston during September, here is a table showcasing the average precipitation for each week:

Week Average Rainfall (inches)
Week 1 X.X
Week 2 X.X
Week 3 X.X
Week 4 X.X

As you can see, the rainfall is relatively consistent throughout the month, with slight variations from week to week. This information can assist you in planning outdoor activities, ensuring you make the most of the drier days while being prepared for the occasional showers.

It’s worth mentioning that the weather in September can be unpredictable, with occasional bursts of rain or even dry spells. Therefore, it’s always a good idea to keep an eye on the local weather forecast and be prepared with appropriate clothing and accessories.

In the next section, we will explore the humidity levels in Boston during September, providing insights into the average humidity levels and how they fluctuate throughout the month. Stay tuned to learn more about this important aspect of Boston’s weather in September.


Humidity in Boston for September

September is a month of transition in Boston, with the summer heat slowly giving way to the cooler temperatures of fall. Along with this shift in weather, there are also changes in humidity levels that can impact your daily activities and comfort. In this section, we will explore the average humidity levels in Boston for September as well as the variations that occur throughout the month.

Average Humidity Levels

When it comes to humidity, Boston experiences a moderate level throughout September. The average humidity hovers around 70%, creating a slightly damp and sticky atmosphere. This can be attributed to the lingering moisture in the air from the fading summer season. While it may not be as muggy as the peak summer months, the humidity is still palpable and can impact how you feel outdoors.

Humidity Variations Throughout the Month

Throughout the month of September, there are noticeable variations in humidity levels that add an element of unpredictability to the weather. At the beginning of the month, the humidity tends to be slightly higher, with levels around 75%. As the month progresses and fall approaches, the humidity gradually decreases.

However, it’s important to note that these variations are not linear and can be influenced by other weather factors. For example, if there is a sudden increase in rainfall or a tropical weather system passing through, the humidity levels can spike temporarily. Conversely, a stretch of dry and sunny days can lead to a decrease in humidity.

To give you a better sense of how the humidity changes throughout September, let’s take a closer look at the weekly averages:

  • Week 1: The humidity starts off relatively high, with an average of 75%.
  • Week 2: As we move into the second week, the humidity drops slightly to around 70%.
  • Week 3: In the third week, the humidity continues to decrease, reaching an average of 65%.
  • Week 4: By the fourth week, the humidity stabilizes at around 60%, signaling the arrival of cooler fall weather.

It’s worth mentioning that these figures are approximate and can vary from year to year. Weather patterns can be influenced by a variety of factors, including global climate patterns and local atmospheric conditions. Therefore, it’s always a good idea to check the most up-to-date weather forecast for the most accurate information.

In summary, September in Boston brings moderate levels of humidity, with an average of around 70%. While it may not be as oppressive as the summer months, the humidity can still impact your comfort and daily activities. Throughout the month, there are variations in humidity levels, with a gradual decrease as fall approaches. However, it’s important to be prepared for sudden changes in humidity due to other weather factors. So, whether you’re planning outdoor activities or simply deciding what to wear, it’s essential to keep an eye on the humidity levels and adjust accordingly.


Wind Conditions in Boston for September

Average Wind Speed

The average wind speed in Boston for September is an important factor to consider when planning your activities and adventures in the city. The wind speed can greatly impact outdoor activities such as sailing, biking, or even just strolling around the city streets.

During September, the average wind speed in Boston ranges from around 7 to 12 miles per hour (mph). However, it’s worth noting that wind speeds can vary throughout the month, so it’s always a good idea to check the weather forecast before heading out.

The wind speed can impact not only your comfort level but also the overall experience of your outdoor activities. For example, if you’re planning a boat trip or a visit to one of Boston’s beautiful parks, a moderate wind speed can provide a refreshing breeze and enhance your experience.

Prevailing Wind Direction

Understanding the prevailing wind direction in Boston for September is essential for various reasons, such as planning outdoor events, determining the best locations for certain activities, or simply knowing which direction the wind is likely to blow.

In September, the prevailing wind in Boston generally comes from the south or southwest. This means that the wind predominantly blows from the south or southwest direction throughout the month. However, it’s important to note that wind patterns can change, and there may be variations during specific days or periods.

The prevailing wind direction can have an impact on various aspects of your visit to Boston. For example, if you’re planning a beach day or a picnic in one of the city’s waterfront parks, knowing the prevailing wind direction can help you choose the best spot for setting up, ensuring a more enjoyable experience.

Understanding the wind conditions can also be useful if you’re participating in outdoor sports or activities that involve wind, such as kite flying or windsurfing. By knowing the prevailing wind direction, you can select the appropriate locations and make the most of your time in Boston.

In summary, when visiting Boston in September, it’s important to consider the average wind speed and prevailing wind direction. These factors can greatly impact your outdoor activities and overall experience in the city. By being aware of the wind conditions, you can plan accordingly and make the most of your time in this vibrant and historic city.

* Key Takeaways:

  • The average wind speed in Boston for September ranges from around 7 to 12 mph.
  • It’s advisable to check the weather forecast before engaging in outdoor activities.
  • Understanding the prevailing wind direction can help in planning outdoor events and choosing suitable locations.
  • In September, the prevailing wind in Boston generally comes from the south or southwest direction.

Sunlight Hours in Boston for September

September in Boston brings a gradual transition from the long, sunny days of summer to the shorter days of autumn. As the season changes, it’s important to know what to expect in terms of sunlight hours. Let’s dive into the details of average daily sunshine and daylight duration changes throughout the month.

Average Daily Sunshine

During September in Boston, you can expect a decent amount of sunshine to brighten your days. On average, there are around X hours of sunshine per day. This means that you’ll have plenty of opportunities to enjoy outdoor activities and explore the city’s vibrant neighborhoods.

The pleasant weather and comfortable temperatures make September an ideal time to soak up the sun and take part in various recreational activities. Whether you’re strolling along the scenic Charles River Esplanade, visiting historical landmarks like the Freedom Trail, or simply enjoying a picnic in one of Boston’s picturesque parks, the ample sunshine will enhance your experience.

Daylight Duration Changes

While the average daily sunshine remains relatively consistent throughout September in Boston, there are noticeable changes in the duration of daylight. At the beginning of the month, the days are still quite long, with daylight lasting for around X hours. This provides ample time to explore all that Boston has to offer, from its renowned museums to its vibrant culinary scene.

As the month progresses, however, you’ll gradually notice the days becoming shorter. By the end of September, the daylight duration decreases to approximately X hours. While this may mean slightly less time for outdoor activities, it also signals the arrival of fall and the opportunity to witness the city’s stunning foliage.

The changing daylight duration in September serves as a reminder to make the most of each day and embrace the beauty of the season. Whether you’re capturing the vibrant colors of the foliage on camera or savoring the crisp autumn air during a leisurely stroll, September in Boston offers a unique blend of natural beauty and cultural experiences.

In summary, September in Boston provides a good amount of daily sunshine, with an average of X hours per day. This allows residents and visitors to enjoy the city’s outdoor attractions and recreational activities. However, it’s important to note that the duration of daylight gradually decreases throughout the month, signaling the transition into fall. Embrace the changing season and make the most of each day by exploring Boston’s diverse neighborhoods and immersing yourself in its rich history and culture.


Table: Average Daily Sunshine in Boston for September

Date Average Daily Sunshine (hours)
1st X
5th X
10th X
15th X
20th X
25th X
30th X

  • Did you know that September in Boston offers a great balance of sunshine and comfortable temperatures?
  • With an average of X hours of daily sunshine, you’ll have ample time to enjoy outdoor activities and explore the city.
  • As the month progresses, the days become shorter, signaling the arrival of fall and the chance to witness the stunning foliage.
  • Make the most of each day by capturing the vibrant colors of the changing season and immersing yourself in Boston’s rich history and culture.
  • Check out the table above to see the average daily sunshine throughout September in Boston.

Extreme Weather Events in Boston for September

September in Boston can bring a range of weather conditions, including the possibility of extreme events. It’s essential to be prepared and informed about historical hurricanes or tropical storms and severe thunderstorms that have impacted the city in the past.

Historical Hurricanes or Tropical Storms

Throughout history, Boston has experienced several hurricanes and tropical storms that have left a lasting impact on the city and its residents. One notable event is the Great New England Hurricane of 1938, also known as the Long Island Express. This powerful hurricane made landfall near Boston on September 21, 1938, causing widespread destruction and claiming hundreds of lives.

Another significant hurricane that affected Boston was Hurricane Carol in 1954. This storm struck on August 31, but its impact was felt well into September. Carol caused extensive damage along the New England coast, including Boston, with strong winds and heavy rainfall.

More recently, Hurricane Irene in 2011 brought strong winds and heavy rain to Boston. Although it didn’t make a direct landfall in the city, its effects were still felt. Irene caused widespread power outages, flooding, and some structural damage.

While these historical hurricanes serve as reminders of the potential dangers, it’s important to note that Boston is not a frequent target for hurricanes. However, as climate patterns shift, it’s crucial to stay informed and prepared for any future hurricane threats that may arise.

Severe Thunderstorms

In addition to hurricanes, severe thunderstorms can also occur in Boston during September. These storms can bring intense rainfall, strong winds, lightning, and even hail. While they may not have the same long-lasting impact as hurricanes, severe thunderstorms can still pose risks to both property and personal safety.

During a severe thunderstorm, it’s important to take necessary precautions. Stay indoors and away from windows, as strong winds can cause flying debris. Unplug electronics to avoid damage from power surges, and avoid using landline phones during a thunderstorm. If you’re outdoors when a severe thunderstorm approaches, seek shelter in a sturdy building or a vehicle.

It’s worth noting that the National Weather Service issues severe thunderstorm warnings when conditions are favorable for the development of such storms. These warnings provide advanced notice to residents, allowing them to take appropriate actions to stay safe.

By staying informed about historical hurricanes or tropical storms and being prepared for severe thunderstorms, you can ensure the safety of yourself and your loved ones during September in Boston.

  • To stay prepared for extreme weather events, consider creating an emergency kit that includes essentials such as non-perishable food, water, flashlights, batteries, and a first aid kit.
  • Keep your mobile devices charged and have a battery-powered radio on hand to stay updated on weather alerts and emergency information.
  • Stay connected with local authorities and follow their instructions during extreme weather events.
  • If you live in an area prone to flooding, consider taking steps to protect your property, such as installing flood barriers or elevating important items in your home.

Remember, being prepared and informed is the key to staying safe during extreme weather events. Stay vigilant, stay informed, and take appropriate actions when necessary.

Table:

Historical Hurricanes/Tropical Storms Impact
1938 Great New England Hurricane Widespread destruction, hundreds of lives lost
1954 Hurricane Carol Extensive damage, strong winds, heavy rainfall
2011 Hurricane Irene Widespread power outages, flooding, some structural damage

Clothing and Packing Tips for September in Boston

September in Boston can bring a mix of weather conditions, from warm and sunny days to cooler temperatures and occasional rain showers. To ensure you’re prepared for any situation, it’s important to pack a versatile wardrobe and essential items that will keep you comfortable throughout your stay. In this section, we’ll discuss appropriate attire for varying weather conditions and the essential items you should pack for September in Boston.

Appropriate Attire for Varying Weather Conditions

When it comes to dressing for September in Boston, it’s all about layering. The weather can be quite unpredictable, so having layers allows you to adjust your clothing accordingly. Here are some tips on what to wear for different weather conditions:

  1. Warm and Sunny Days: On days when the sun is shining and temperatures are higher, you’ll want to dress in lightweight and breathable clothing. Opt for short-sleeved shirts, skirts, or dresses made from natural fibers like cotton or linen. Don’t forget to bring a wide-brimmed hat, sunglasses, and sunscreen to protect yourself from the sun’s rays.
  2. Cooler Temperatures: As September progresses, the temperatures can start to drop, especially in the evenings. It’s a good idea to have a lightweight jacket or sweater on hand for these cooler moments. You can easily layer it over your t-shirt or blouse during the day and add another layer, such as a scarf or cardigan, in the evening.
  3. Rainy Days: September in Boston can also bring some rainy days. It’s essential to pack a waterproof or water-resistant jacket or coat to stay dry. Consider bringing an umbrella or a compact rain poncho that you can easily carry with you. Don’t forget to wear shoes that are water-resistant or bring along a pair of rain boots if you plan on exploring the city on foot.

Essential Items to Pack for September in Boston

In addition to your clothing choices, there are a few essential items you should pack to ensure a comfortable stay in Boston during September. Here’s a checklist of what you’ll need:

  1. Comfortable Walking Shoes: Boston is a city that’s best explored on foot, so make sure to pack a pair of comfortable walking shoes. Whether you prefer sneakers, flats, or sandals, choose a pair that provides support and cushioning for long walks.
  2. Lightweight Backpack or Tote Bag: A lightweight backpack or tote bag is essential for carrying your daily essentials while exploring the city. It’s a convenient way to carry your water bottle, snacks, extra layers of clothing, and any other items you may need throughout the day.
  3. Reusable Water Bottle: Staying hydrated is important, especially when you’re out and about exploring. Bring a reusable water bottle to refill throughout the day. Boston has numerous water fountains and refill stations where you can easily access clean drinking water.
  4. Travel-sized Umbrella: As mentioned earlier, September in Boston can bring some rainy days. It’s always a good idea to have a compact, travel-sized umbrella in your bag, so you’re prepared for unexpected showers.
  5. Travel Adapter: If you’re traveling from a different country, don’t forget to pack a travel adapter for your electronics. This will ensure that you can charge your devices without any issues while in Boston.
  6. Portable Charger: With all the sightseeing and exploring you’ll be doing, your phone’s battery may drain quickly. A portable charger is a lifesaver in such situations, allowing you to recharge your devices on the go.

Remember, packing light is key, so try to choose versatile clothing pieces that can be mixed and matched. By layering your clothing and having the essential items mentioned above, you’ll be well-prepared for whatever weather September in Boston brings your way.


Essential Items Checklist
– Comfortable Walking Shoes
– Lightweight Backpack or Tote Bag
– Reusable Water Bottle
– Travel-sized Umbrella
– Travel Adapter
– Portable Charger

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