Average annual temperature is 11.8 °C
Absolute maximum temperature: 30.2 °C
Absolute minimum temperature: -21.3 °C
Number of sunny days: 173 days
Number of rainy days: 189 days
Number of snow days: 3 days
Look at detailed online map of Westerly
* Weather data for Westerly 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) | 14.4 | 18.1 | 12.3 | 25.6 | 25.3 | 24.7 | 29.7 | 27.7 | 30.2 | 24.9 | 16.8 | 15.5 |
| Average daytime temperature (°C) | 7.4 | 6.5 | 8.3 | 14.1 | 18.4 | 21.5 | 26.3 | 24.8 | 22.2 | 18.3 | 10.4 | 8.6 |
| Average temperature (°C) | 4.0 | 2.4 | 4.3 | 10.2 | 13.9 | 17.5 | 22.8 | 21.2 | 18.7 | 14.3 | 6.2 | 5.3 |
| Average night temperature (°C) | 1.1 | -1.7 | 0.5 | 6.5 | 9.5 | 13.9 | 19.7 | 17.9 | 15.8 | 11.0 | 2.4 | 2.3 |
| Absolute minimum temperature (°C) | -4.0 | -21.3 | -3.4 | -0.9 | 3.4 | 7.5 | 15.5 | 14.4 | 9.8 | 6.2 | -4.1 | -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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| 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) | 4.2 | 6.6 | 7.5 | 8.7 | 12.0 | 10.7 | 11.2 | 10.3 | 7.6 | 8.2 | 7.2 | 5.7 |
| Precipitation (mm) | 173 | 53 | 120 | 99 | 72 | 98 | 167 | 120 | 233 | 61 | 39 | 178 |
| Sunny days | 8 | 13 | 16 | 16 | 22 | 10 | 13 | 9 | 12 | 15 | 22 | 17 |
| Rainy days | 22 | 13 | 15 | 14 | 9 | 20 | 18 | 22 | 18 | 16 | 8 | 14 |
| Snow days | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Westerly during the most sunny months:
The largest precipitation sum in Westerly is at