Average annual temperature is 10.6 °C
Absolute maximum temperature: 33.3 °C
Absolute minimum temperature: -25.2 °C
Number of sunny days: 162 days
Number of rainy days: 192 days
Number of snow days: 11 days
Look at detailed online map of Billerica
* Weather data for Billerica 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) | 12.2 | 15.1 | 16.0 | 30.8 | 30.1 | 32.2 | 31.7 | 28.5 | 33.3 | 27.9 | 18.3 | 16.1 |
| Average daytime temperature (°C) | 5.3 | 5.3 | 7.6 | 15.6 | 20.9 | 23.3 | 27.8 | 25.3 | 22.7 | 18.5 | 8.8 | 7.6 |
| Average temperature (°C) | 1.5 | -0.3 | 2.5 | 9.5 | 14.2 | 17.5 | 22.8 | 20.2 | 18.0 | 13.4 | 3.8 | 3.0 |
| Average night temperature (°C) | -2.0 | -5.3 | -1.7 | 4.9 | 8.4 | 13.2 | 18.8 | 16.3 | 14.4 | 9.4 | 0.0 | -0.2 |
| Absolute minimum temperature (°C) | -7.6 | -25.2 | -7.0 | -3.5 | 1.9 | 6.7 | 13.5 | 11.9 | 7.2 | 1.2 | -5.5 | -7.3 |
| 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) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.0 | 6.0 | 7.4 | 8.3 | 11.4 | 9.0 | 10.6 | 9.5 | 7.1 | 7.5 | 7.0 | 5.3 |
| Precipitation (mm) | 170 | 51 | 148 | 76 | 74 | 134 | 196 | 142 | 228 | 67 | 43 | 148 |
| Sunny days | 8 | 12 | 14 | 17 | 19 | 5 | 7 | 11 | 12 | 17 | 21 | 19 |
| Rainy days | 19 | 12 | 15 | 13 | 12 | 25 | 24 | 20 | 18 | 14 | 8 | 12 |
| Snow days | 4 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Billerica during the most sunny months:
The largest precipitation sum in Billerica is at