Boston weather by month

Check out Boston weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Boston (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
34°F maximum daytime temperature in January in Boston34
37°F maximum daytime temperature in February in Boston37
46°F maximum daytime temperature in March in Boston46
57°F maximum daytime temperature in April in Boston57
68°F maximum daytime temperature in May in Boston68
77°F maximum daytime temperature in June in Boston77
82°F maximum daytime temperature in July in Boston82
81°F maximum daytime temperature in August in Boston81
73°F maximum daytime temperature in September in Boston73
63°F maximum daytime temperature in October in Boston63
52°F maximum daytime temperature in November in Boston52
39°F maximum daytime temperature in December in Boston39
Min temperature (night-time)
18°F minimum night-time temperature in January in Boston18
19°F minimum night-time temperature in February in Boston19
28°F minimum night-time temperature in March in Boston28
37°F minimum night-time temperature in April in Boston37
48°F minimum night-time temperature in May in Boston48
57°F minimum night-time temperature in June in Boston57
63°F minimum night-time temperature in July in Boston63
61°F minimum night-time temperature in August in Boston61
54°F minimum night-time temperature in September in Boston54
43°F minimum night-time temperature in October in Boston43
36°F minimum night-time temperature in November in Boston36
23°F minimum night-time temperature in December in Boston23
Heat & Humidity
No heat & humidity in January in Boston0
No heat & humidity in February in Boston0
No heat & humidity in March in Boston0
No heat & humidity in April in Boston0
No heat & humidity in May in Boston0
Low heat & humidity in June in BostonL
Moderate heat & humidity in July in BostonM
Low heat & humidity in August in BostonL
No heat & humidity in September in Boston0
No heat & humidity in October in Boston0
No heat & humidity in November in Boston0
No heat & humidity in December in Boston0
Sea temperature
39°F sea temperature in January in Boston39
37°F sea temperature in February in Boston37
37°F sea temperature in March in Boston37
41°F sea temperature in April in Boston41
48°F sea temperature in May in Boston48
57°F sea temperature in June in Boston57
64°F sea temperature in July in Boston64
64°F sea temperature in August in Boston64
61°F sea temperature in September in Boston61
55°F sea temperature in October in Boston55
48°F sea temperature in November in Boston48
45°F sea temperature in December in Boston45

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Boston

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Boston9
11 hours of daylight per day in February in Boston11
12 hours of daylight per day in March in Boston12
13 hours of daylight per day in April in Boston13
15 hours of daylight per day in May in Boston15
15 hours of daylight per day in June in Boston15
15 hours of daylight per day in July in Boston15
14 hours of daylight per day in August in Boston14
12 hours of daylight per day in September in Boston12
11 hours of daylight per day in October in Boston11
10 hours of daylight per day in November in Boston10
9 hours of daylight per day in December in Boston9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Boston1
UV (maximum) index 2 (Low) in February in Boston2
UV (maximum) index 4 (Moderate) in March in Boston4
UV (maximum) index 5 (Moderate) in April in Boston5
UV (maximum) index 7 (High) in May in Boston7
UV (maximum) index 8 (Very High) in June in Boston8
UV (maximum) index 8 (Very High) in July in Boston8
UV (maximum) index 8 (Very High) in August in Boston8
UV (maximum) index 6 (High) in September in Boston6
UV (maximum) index 4 (Moderate) in October in Boston4
UV (maximum) index 2 (Low) in November in Boston2
UV (maximum) index 1 (Low) in December in Boston1

Rainfall in Boston

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
11 days with some rainfall in January in Boston11
10 days with some rainfall in February in Boston10
11 days with some rainfall in March in Boston11
11 days with some rainfall in April in Boston11
11 days with some rainfall in May in Boston11
11 days with some rainfall in June in Boston11
9 days with some rainfall in July in Boston9
10 days with some rainfall in August in Boston10
8 days with some rainfall in September in Boston8
9 days with some rainfall in October in Boston9
11 days with some rainfall in November in Boston11
12 days with some rainfall in December in Boston12
Average monthly rainfall (inches)
3.7 inches monthly rainfall in January in Boston3.7
3.7 inches monthly rainfall in February in Boston3.7
3.8 inches monthly rainfall in March in Boston3.8
3.7 inches monthly rainfall in April in Boston3.7
3.3 inches monthly rainfall in May in Boston3.3
3.1 inches monthly rainfall in June in Boston3.1
3.0 inches monthly rainfall in July in Boston3.0
3.3 inches monthly rainfall in August in Boston3.3
3.2 inches monthly rainfall in September in Boston3.2
3.4 inches monthly rainfall in October in Boston3.4
4.4 inches monthly rainfall in November in Boston4.4
4.1 inches monthly rainfall in December in Boston4.1

More about Boston

Boston by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Massachusetts (Boston) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Boston?

Boston has a cold climate with hot summers and some rainfall in all months.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Boston, Massachusetts hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
1.2%
1.7%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the USA

Compare Boston with the USA

Below the Boston chart shows average maximum daytime temperature for Boston, Massachusetts, USA and the USA (Washington).

Maximum daytime temperature (°F)

Boston, Massachusetts, USA
USA (Washington)
34
41
37
45
46
55
57
66
68
75
77
84
82
88
81
86
73
79
63
68
52
57
39
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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