Average annual temperature is 15.0 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -7.1 °C
Number of sunny days: 185 days
Number of rainy days: 177 days
Number of snow days: 3 days
Look at detailed online map of Boston
* Weather data for Boston United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 19.8 | 23.5 | 26.0 | 28.7 | 30.0 | 34.2 | 35.1 | 35.9 | 32.2 | 30.3 | 26.4 | 18.0 |
| Average daytime temperature (°C) | 10.4 | 13.8 | 14.7 | 20.6 | 24.8 | 29.0 | 30.7 | 29.8 | 28.1 | 21.3 | 15.1 | 11.2 |
| Average temperature (°C) | 5.9 | 7.5 | 8.4 | 13.7 | 18.7 | 22.5 | 25.3 | 24.4 | 21.8 | 15.9 | 9.2 | 6.1 |
| Average night temperature (°C) | 2.5 | 3.0 | 3.6 | 8.1 | 13.2 | 16.8 | 20.7 | 19.8 | 16.6 | 11.6 | 4.9 | 2.5 |
| Absolute minimum temperature (°C) | -5.0 | -7.1 | -6.6 | 0.0 | 4.3 | 11.6 | 16.2 | 14.3 | 11.7 | -1.1 | -4.9 | -6.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.9 | 7.4 | 7.9 | 9.8 | 10.9 | 11.6 | 11.7 | 10.4 | 10.8 | 8.0 | 7.8 | 6.1 |
| Precipitation (mm) | 130 | 104 | 209 | 124 | 71 | 52 | 96 | 132 | 13 | 93 | 36 | 69 |
| Sunny days | 9 | 15 | 14 | 15 | 14 | 17 | 12 | 16 | 17 | 19 | 22 | 15 |
| Rainy days | 20 | 13 | 16 | 15 | 17 | 13 | 19 | 15 | 13 | 12 | 8 | 16 |
| Snow days | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Boston during the most sunny months:
The largest precipitation sum in Boston is at