Average annual temperature is 8.2 °C
Absolute maximum temperature: 33.7 °C
Absolute minimum temperature: -32.7 °C
Number of sunny days: 105 days
Number of rainy days: 214 days
Number of snow days: 46 days
Look at detailed online map of Town of Westford
* Weather data for Town of Westford 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) | 9.0 | 11.3 | 10.6 | 26.4 | 30.9 | 33.7 | 31.1 | 25.7 | 29.2 | 28.2 | 14.5 | 12.2 |
| Average daytime temperature (°C) | 0.5 | 0.7 | 3.5 | 14.4 | 18.9 | 22.9 | 25.9 | 22.3 | 21.5 | 15.3 | 5.1 | 3.3 |
| Average temperature (°C) | -3.0 | -5.2 | -1.0 | 7.9 | 12.7 | 17.6 | 21.2 | 18.0 | 16.5 | 11.5 | 1.1 | -0.2 |
| Average night temperature (°C) | -6.5 | -10.7 | -5.4 | 2.6 | 6.5 | 12.9 | 17.3 | 14.5 | 12.3 | 8.2 | -1.9 | -3.4 |
| Absolute minimum temperature (°C) | -18.0 | -32.7 | -11.0 | -6.5 | -0.3 | 5.8 | 12.8 | 10.6 | 5.1 | -1.3 | -8.3 | -11.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.4 | 11.9 | 13.5 | 14.8 | 15.5 | 15.2 | 14.0 | 12.5 | 11.0 | 9.6 | 8.9 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 2.3 | 5.3 | 5.5 | 7.7 | 10.9 | 9.3 | 10.3 | 9.8 | 8.5 | 5.7 | 4.5 | 3.2 |
| Precipitation (mm) | 113 | 76 | 102 | 108 | 67 | 143 | 320 | 261 | 55 | 143 | 89 | 157 |
| Sunny days | 3 | 6 | 6 | 12 | 17 | 8 | 3 | 5 | 17 | 8 | 8 | 12 |
| Rainy days | 13 | 11 | 16 | 18 | 14 | 22 | 28 | 26 | 13 | 23 | 16 | 14 |
| Snow days | 15 | 11 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 5 |
The best time to visit Town of Westford during the most sunny months:
Months with the longest average daylight duration in Town of Westford:
The largest precipitation sum in Town of Westford is at