Contents
- The climate of Boston, MA
- The best time to visit Boston, MA
- The worst time to visit Boston, MA
- Weather hazards
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
A beautiful natural park with the George Washington Monument in Boston, Massachusetts
The climate of Boston, MA
Boston, the capital of and the most populated municipality of the Commonwealth of Massachusetts, has a humid subtropical climate (Köppen classification Cfa).
This climate is characterized by warm and humid summers, cold and stormy winters, and mild but varied springs and autumns. Boston is conveniently located on the shores of the Atlantic Ocean, but the prevailing winds minimize the effect of the Atlantic Ocean on Boston's climate.
Spring in Boston has varying weather. The first few weeks feel cold, and continue to experience a low temperature and minimal snowfall, gradually warming up to as high as 77°F (25°C). The afternoon rainfall is accompanied by thunderstorms, and precaution is advised.
Autumn is mild and pleasant and often has stable weather initially. Towards the end of the season, it gets cold, and Boston already receives the first of its snowfall.
Summer is hot and humid but sometimes varies to become fresh and pleasant. Humidity during summer is high, and the hottest days feel muggy, and uncomfortable heat waves are not uncommon during summer, appreciative of the high temperature and many sunshine hours per day.
Winters are cold and snowy, with occasional occurrences of blizzards, which make most days feel colder than registered. Snowfall can be high, resulting in high accumulation on the ground, extended for several weeks. Boston is susceptible to snowstorms and severe cold spells during winter, and additional warm clothing is advised.
This climate is characterized by warm and humid summers, cold and stormy winters, and mild but varied springs and autumns. Boston is conveniently located on the shores of the Atlantic Ocean, but the prevailing winds minimize the effect of the Atlantic Ocean on Boston's climate.
Spring in Boston has varying weather. The first few weeks feel cold, and continue to experience a low temperature and minimal snowfall, gradually warming up to as high as 77°F (25°C). The afternoon rainfall is accompanied by thunderstorms, and precaution is advised.
Autumn is mild and pleasant and often has stable weather initially. Towards the end of the season, it gets cold, and Boston already receives the first of its snowfall.
Summer is hot and humid but sometimes varies to become fresh and pleasant. Humidity during summer is high, and the hottest days feel muggy, and uncomfortable heat waves are not uncommon during summer, appreciative of the high temperature and many sunshine hours per day.
Winters are cold and snowy, with occasional occurrences of blizzards, which make most days feel colder than registered. Snowfall can be high, resulting in high accumulation on the ground, extended for several weeks. Boston is susceptible to snowstorms and severe cold spells during winter, and additional warm clothing is advised.
The best time to visit Boston, MA
The best time to visit Boston is during spring, specifically from mid-May to mid-June, and during autumn from September to early October.
Spring has tolerable weather, and the absence of the winter chill makes it possible for touring Boston and other outdoor activities. The wild blossoms during spring transform Boston into a beautiful garden and fill the crisp, fresh air with sweet flowery scents.
During autumn, the weather is steady and reliable. The temperature is also tolerable as the extreme summer heat cools down considerably to a warm and pleasant range. The excellent fall foliage brings extraordinary beauty to Boston, as the golden-brown leaves dropping off trees leave a lingering magnificence. When reflected in the waterfront and the modern skyscrapers, the fall becomes even more admirable.
Spring has tolerable weather, and the absence of the winter chill makes it possible for touring Boston and other outdoor activities. The wild blossoms during spring transform Boston into a beautiful garden and fill the crisp, fresh air with sweet flowery scents.
During autumn, the weather is steady and reliable. The temperature is also tolerable as the extreme summer heat cools down considerably to a warm and pleasant range. The excellent fall foliage brings extraordinary beauty to Boston, as the golden-brown leaves dropping off trees leave a lingering magnificence. When reflected in the waterfront and the modern skyscrapers, the fall becomes even more admirable.
The worst time to visit Boston, MA
The worst time to visit Boston is during winter. The temperature is extremely low and almost unbearable. Also, severe blizzards and snowstorms hit Boston periodically during winter, causing significant harm and damage. The extreme winter chill reduces most outdoor activities considerably. As the snow can remain on the ground for weeks, skating and skiing are everyone's favorite activities.
Summer is usually crowded and extremely hot. This season is not the best period to visit Boston as you will not only be dealing with extreme temperature, but also weather hazards like thunderstorms.
Summer is usually crowded and extremely hot. This season is not the best period to visit Boston as you will not only be dealing with extreme temperature, but also weather hazards like thunderstorms.
Weather hazards
Boston is susceptible to severe blizzards during winter, making the weather too cold and almost unbearable. Periodically, there will be snowstorms as well, that cause significant damage. During summer, the extremely high temperature causes harmful heat waves, considering the UV index is at its highest point. The rainy afternoons are accompanied by thunderstorms that can cause massive damage.
Weather in January
January, like December, in Boston, Massachusetts, is a wintry winter month, with an average temperature ranging between max 34.2°F (1.2°C) and min 22.6°F (-5.2°C). With an average high-temperature of 34.2°F (1.2°C) and an average low-temperature of 22.6°F (-5.2°C), January is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Boston, is another cold month, with temperature in the range of an average low of 23.5°F (-4.7°C) and an average high of 36.5°F (2.5°C). In Boston, the average high-temperature in February is almost the same as in January - a still cold 36.5°F (2.5°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Boston, Massachusetts, with an average temperature fluctuating between 30.9°F (-0.6°C) and 43.5°F (6.4°C). In March, the average high-temperature slightly increases from a cold 36.5°F (2.5°C) in February to a chilly 43.5°F (6.4°C). Weather in March »
Weather in April
April in Boston, Massachusetts, is a cool spring month, with an average temperature varying between 55.2°F (12.9°C) and 40.5°F (4.7°C). In Boston, the average high-temperature in April increases from a chilly 43.5°F (6.4°C) in March to a cool 55.2°F (12.9°C). Weather in April »
Weather in May
May, the last month of the spring in Boston, is a comfortable month, with temperature in the range of an average high of 66.4°F (19.1°C) and an average low of 50°F (10°C). In Boston, the average high-temperature in May rises from a fresh 55.2°F (12.9°C) in April to a comfortable 66.4°F (19.1°C). Weather in May »
Weather in June
June, the first month of the summer in Boston, is a moderately hot month, with an average temperature varying between 74.3°F (23.5°C) and 57.6°F (14.2°C). In June, the average high-temperature marginally rises from an enjoyable 66.4°F (19.1°C) in May to a moderately hot 74.3°F (23.5°C). Weather in June »
Weather in July
July, like June, in Boston, Massachusetts, is another warm summer month, with an average temperature varying between 81.7°F (27.6°C) and 64.9°F (18.3°C). The warmest month is July, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 64.9°F (18.3°C). The average heat index in July is estimated at a tropical 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Boston, Massachusetts, with an average temperature varying between 80.4°F (26.9°C) and 64°F (17.8°C). In Boston, the average high-temperature in August is almost the same as in July - a still warm 80.4°F (26.9°C). Weather in August »
Weather in September
September, the first month of the autumn in Boston, is also an agreeable month, with an average temperature ranging between max 72.7°F (22.6°C) and min 57.4°F (14.1°C). In September, the average high-temperature marginally drops from a moderately hot 80.4°F (26.9°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »
Weather in October
October, like September, in Boston, Massachusetts, is another comfortable autumn month, with an average temperature varying between 48.4°F (9.1°C) and 61.5°F (16.4°C). In October, the average high-temperature decreases from an agreeable 72.7°F (22.6°C) in September to an enjoyable 61.5°F (16.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Boston, is another chilly month, with an average temperature ranging between min 37.9°F (3.3°C) and max 49.5°F (9.7°C). In November, the average high-temperature decreases from an enjoyable 61.5°F (16.4°C) in October to a frosty 49.5°F (9.7°C). Weather in November »
Weather in December
December, the first month of the winter in Boston, is also a wintry month, with temperature in the range of an average low of 29.7°F (-1.3°C) and an average high of 39.9°F (4.4°C). In December, the average high-temperature decreases from a frosty 49.5°F (9.7°C) in November to a cold 39.9°F (4.4°C). Weather in December »
[Resources]FAQ
What is the coldest month in Boston?
January is the coldest month in Boston, with an average high-temperature of 34.2°F (1.2°C) and an average low-temperature of 22.6°F (-5.2°C).
How much does it rain in Boston?
Throughout the year, there are 141.4 rainfall days, and 27.2" (691mm) of precipitation is accumulated.
When does it snow in Boston?
Months with snowfall in Boston are January through May, October through December.
How many days does it snow in Boston?
Throughout the year, there are 29.8 snowfall days, and 15.75" (400mm) of snow is accumulated.
What is the month with the lowest UV index in Boston?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What is the most humid month in Boston?
February is the most humid month in Boston, Massachusetts, with an average relative humidity of 77%.
When does it snow the most in Boston?
The month with the most snowfall is February, when snow falls for 7.6 days and typically aggregates up to 4.72" (120mm) of snow.
What month is the ocean coldest in Boston?
February is the month with the coldest seawater in Boston, with an average ocean temperature of 38.1°F (3.4°C).
What is the month with the least sunshine in Boston?
With an average of 4.6h of sunshine, February has the least sunshine of the year.
What is the rainiest month in Boston?
The months with the most rainfall are March, April and December, with an average 2.91" (74mm) of precipitation.
When is Daylight Saving Time (DST) in Boston?
On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Boston, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month in Boston?
With an average relative humidity of 69%, April is the least humid month in Boston, Massachusetts.
When it does not snow in Boston?
In Boston, snow does not fall in June through September.
When are the longest days in Boston?
With an average of 15h and 14min of daylight, June has the longest days of the year in Boston.
What are the months with the highest UV index in Boston?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the warmest month in Boston?
With an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 64.9°F (18.3°C), July is the warmest month.
When is the ocean warmest in Boston?
With an average ocean temperature of 68°F (20°C), August is the month with the warmest seawater in Boston, Massachusetts.
What month has the most sunshine in Boston?
With an average of 10.5h of sunshine, August has the most sunshine of the year in Boston, Massachusetts.
What is the driest month in Boston?
September is the month with the least rainfall in Boston, Massachusetts. Rain falls for 10 days and accumulates 1.26" (32mm) of precipitation.
What is the month with the shortest days in Boston?
With an average of 9h and 8min of daylight, December has the shortest days of the year.
Average temperature
Boston, MA
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure
Boston, MA
- Average pressure in January:
30"Hg - Average pressure in February:
29.98"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.03"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Boston, MA
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.4mph - Average wind speed in April:
8.6mph - Average wind speed in May:
7.4mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.8mph - Average wind speed in October:
8.3mph - Average wind speed in November:
8.8mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Boston, MA
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall
Boston, MA
- Average rainfall in January:
2.28" - Average rainfall in February:
2.24" - Average rainfall in March:
2.91" - Average rainfall in April:
2.91" - Average rainfall in May:
1.81" - Average rainfall in June:
2.13"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.61" - Average rainfall in September:
1.26" - Average rainfall in October:
2.56" - Average rainfall in November:
2.68" - Average rainfall in December:
2.91"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days
Boston, MA
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
8.2 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
13.6 days
- Average rainfall days in July:
14.7 days - Average rainfall days in August:
11.7 days - Average rainfall days in September:
10 days - Average rainfall days in October:
13.3 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
10.1 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall
Boston, MA
- Average snowfall in January:
2.76" - Average snowfall in February:
4.72" - Average snowfall in March:
3.86" - Average snowfall in April:
0.79" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Boston, MA
- Average snowfall days in January:
7.6 days - Average snowfall days in February:
7.6 days - Average snowfall days in March:
6.8 days - Average snowfall days in April:
1 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
5.2 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature
Boston, MA
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight / Average sunshine
Boston, MA
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 35min - Average daylight in March:
11h and 58min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 37min - Average daylight in June:
15h and 14min
- Average daylight in July:
14h and 55min - Average daylight in August:
13h and 51min - Average daylight in September:
12h and 28min - Average daylight in October:
11h and 3min - Average daylight in November:
9h and 47min - Average daylight in December:
9h and 8min
The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).
- Average sunshine in January:
5h and 6min - Average sunshine in February:
4h and 36min - Average sunshine in March:
5h and 36min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 6min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 24min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Boston, MA
- Average sunshine days in January:
17.5 days - Average sunshine days in February:
14.2 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
14.2 days - Average sunshine days in June:
14.8 days
- Average sunshine days in July:
15.3 days - Average sunshine days in August:
17 days - Average sunshine days in September:
17.7 days - Average sunshine days in October:
15.7 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index
Boston, MA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Boston, MA
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Boston, MA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location
