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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 22°C, while the coldest is January averaging around 1°C at night. Precipitation is fairly even year-round, totalling about 574 mm. 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 (°C) | 7 | 8 | 11 | 14 | 17 | 20 | 22 | 22 | 19 | 15 | 10 | 7 |
| Avg temp (°C) | 4 | 5 | 7 | 9 | 12 | 15 | 17 | 17 | 14 | 11 | 7 | 4 |
| Avg low (°C) | 1 | 1 | 3 | 4 | 7 | 10 | 12 | 12 | 10 | 7 | 4 | 2 |
| Precipitation (mm) | 43 | 39 | 37 | 38 | 45 | 55 | 53 | 55 | 51 | 59 | 53 | 47 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 11 | 14 | 17 | 20 |
| Avg temp (°C) | 4 | 5 | 7 | 9 | 12 | 15 |
| Avg low (°C) | 1 | 1 | 3 | 4 | 7 | 10 |
| Precipitation (mm) | 43 | 39 | 37 | 38 | 45 | 55 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 19 | 15 | 10 | 7 |
| Avg temp (°C) | 17 | 17 | 14 | 11 | 7 | 4 |
| Avg low (°C) | 12 | 12 | 10 | 7 | 4 | 2 |
| Precipitation (mm) | 53 | 55 | 51 | 59 | 53 | 47 |
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.