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The tables below display average monthly climate and weather indicators in Boston Massachusetts.
Temperature by: Fahrenheit / Centigrade
| Boston Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature |
-1.9 |
-0.9 |
3.7 |
8.9 |
14.6 |
19.8 |
23.1 |
22.2 |
18.2 |
12.7 |
7.4 |
0.9 |
10.7 |
| Avg. Max Temperature |
2.1 |
3.1 |
7.7 |
13.3 |
19.2 |
24.6 |
27.7 |
26.6 |
22.7 |
17.1 |
11.2 |
4.7 |
15.0 |
| Avg. Min Temperature |
-5.8 |
-5.0 |
-0.4 |
4.6 |
9.9 |
15.1 |
18.4 |
17.8 |
13.8 |
8.3 |
3.5 |
-2.9 |
6.4 |
| Days with Max Temp of 32 C or Higher |
0.0 |
0.0 |
0.0 |
< 0.5 |
< 0.5 |
3.0 |
6.0 |
3.0 |
1.0 |
0.0 |
0.0 |
0.0 |
12.0 |
| Days with Min Temp Below Freezing |
26.0 |
23.0 |
17.0 |
2.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
7.0 |
21.0 |
97.0 |
| | |
| Boston Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days |
1128 |
972 |
818 |
507 |
221 |
32.0 |
0.0 |
6.0 |
72.0 |
321 |
591 |
973 |
5641 |
| Cooling Degree Days |
0.0 |
0.0 |
0.0 |
0.0 |
10.0 |
113 |
264 |
220 |
66.0 |
5.0 |
0.0 |
0.0 |
678 |
| | |
| Boston Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) |
3.6 |
3.6 |
3.7 |
3.6 |
3.2 |
3.1 |
2.8 |
3.2 |
3.1 |
3.3 |
4.2 |
4.0 |
41.5 |
| Days with Precipitation 0.01 inch or More |
12.0 |
10.0 |
12.0 |
11.0 |
12.0 |
11.0 |
9.0 |
10.0 |
9.0 |
9.0 |
11.0 |
12.0 |
127 |
| Monthly Snowfall (inches) |
12.8 |
11.8 |
8.0 |
0.9 |
0.0 |
0.0 |
0.0 |
< 0.05 |
0.0 |
0.0 |
1.3 |
7.6 |
42.4 |
| | |
| Other Boston Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed |
13.8 |
13.9 |
13.7 |
13.1 |
12.1 |
11.4 |
11.0 |
10.8 |
11.3 |
11.9 |
12.8 |
13.5 |
12.4 |
| Clear Days |
9.0 |
8.0 |
8.0 |
7.0 |
6.0 |
7.0 |
7.0 |
9.0 |
10.0 |
11.0 |
8.0 |
9.0 |
98.0 |
| Partly Cloudy Days |
7.0 |
7.0 |
8.0 |
8.0 |
10.0 |
10.0 |
12.0 |
11.0 |
8.0 |
8.0 |
7.0 |
7.0 |
103 |
| Cloudy Days |
15.0 |
13.0 |
15.0 |
15.0 |
15.0 |
13.0 |
12.0 |
11.0 |
12.0 |
12.0 |
15.0 |
15.0 |
164 |
| Percent of Possible Sunshine |
53.0 |
56.0 |
57.0 |
56.0 |
58.0 |
63.0 |
65.0 |
65.0 |
63.0 |
60.0 |
50.0 |
52.0 |
58.0 |
| Avg. Relative Humidity |
51.0 |
63.0 |
63.0 |
63.0 |
63.0 |
66.0 |
66.0 |
66.5 |
69.0 |
68.5 |
66.0 |
64.5 |
65.5 |
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