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Boston, England climate
Cfb Oceanic / temperate
Boston has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 72°F, while the coldest is January averaging around 34°F at night. Precipitation is fairly even year-round, totalling about 23 inches. At latitude 53°N, day length swings from 7.3 hours in midwinter to 16.7 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Boston climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 47 | 51 | 56 | 62 | 67 | 72 | 72 | 66 | 58 | 51 | 45 |
| Avg temp (°F) | 40 | 40 | 44 | 48 | 54 | 59 | 63 | 63 | 58 | 51 | 44 | 40 |
| Avg low (°F) | 34 | 34 | 37 | 40 | 45 | 50 | 54 | 54 | 50 | 45 | 38 | 35 |
| Precipitation (in) | 1.7 | 1.5 | 1.5 | 1.5 | 1.8 | 2.2 | 2.1 | 2.2 | 2.0 | 2.3 | 2.1 | 1.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 47 | 51 | 56 | 62 | 67 |
| Avg temp (°F) | 40 | 40 | 44 | 48 | 54 | 59 |
| Avg low (°F) | 34 | 34 | 37 | 40 | 45 | 50 |
| Precipitation (in) | 1.7 | 1.5 | 1.5 | 1.5 | 1.8 | 2.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 72 | 72 | 66 | 58 | 51 | 45 |
| Avg temp (°F) | 63 | 63 | 58 | 51 | 44 | 40 |
| Avg low (°F) | 54 | 54 | 50 | 45 | 38 | 35 |
| Precipitation (in) | 2.1 | 2.2 | 2.0 | 2.3 | 2.1 | 1.8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 74 | 75 | 74 | 73 | 77 | 74 | 75 | 73 | 74 | 73 | 71 |
| Relative humidity (%) | 92 | 89 | 85 | 82 | 80 | 80 | 80 | 80 | 83 | 87 | 92 | 94 |
| Wind speed (mph) | 9.8 | 9.7 | 9.0 | 7.9 | 7.7 | 7.0 | 6.9 | 7.4 | 8.1 | 9.0 | 9.1 | 9.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 74 | 75 | 74 | 73 | 77 |
| Relative humidity (%) | 92 | 89 | 85 | 82 | 80 | 80 |
| Wind speed (mph) | 9.8 | 9.7 | 9.0 | 7.9 | 7.7 | 7.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 75 | 73 | 74 | 73 | 71 |
| Relative humidity (%) | 80 | 80 | 83 | 87 | 92 | 94 |
| Wind speed (mph) | 6.9 | 7.4 | 8.1 | 9.0 | 9.1 | 9.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Coningsby, a weather station, about 16 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.