Average annual temperature is 5.4 °C
Absolute maximum temperature: 27.0 °C
Absolute minimum temperature: -34.8 °C
Number of sunny days: 103 days
Number of rainy days: 214 days
Number of snow days: 48 days
Look at detailed online map of Town of Glastenbury
* Weather data for Town of Glastenbury 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) | 7.5 | 7.6 | 7.5 | 23.6 | 24.8 | 27.0 | 25.5 | 21.5 | 25.2 | 24.3 | 10.9 | 10.4 |
| Average daytime temperature (°C) | -0.8 | -1.6 | 0.8 | 9.6 | 14.9 | 17.9 | 21.9 | 18.8 | 17.0 | 11.9 | 1.9 | 1.4 |
| Average temperature (°C) | -4.2 | -6.5 | -3.4 | 4.6 | 9.1 | 13.4 | 18.0 | 15.1 | 13.2 | 8.4 | -1.9 | -2.1 |
| Average night temperature (°C) | -7.5 | -11.4 | -6.9 | 0.0 | 4.2 | 9.7 | 14.9 | 12.1 | 10.3 | 5.2 | -5.0 | -4.9 |
| Absolute minimum temperature (°C) | -17.3 | -34.8 | -13.3 | -11.8 | -3.5 | 3.2 | 9.0 | 7.8 | 5.0 | -5.2 | -14.4 | -14.9 |
| 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) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 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) | 3.3 | 6.0 | 6.5 | 8.3 | 11.6 | 10.1 | 10.6 | 10.1 | 7.9 | 6.9 | 6.6 | 4.3 |
| Precipitation (mm) | 146 | 75 | 165 | 110 | 73 | 162 | 320 | 127 | 134 | 152 | 67 | 151 |
| Sunny days | 4 | 7 | 9 | 14 | 16 | 3 | 2 | 4 | 13 | 10 | 10 | 11 |
| Rainy days | 15 | 9 | 11 | 15 | 14 | 27 | 29 | 27 | 17 | 21 | 13 | 16 |
| Snow days | 12 | 12 | 11 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 7 | 4 |
The best time to visit Town of Glastenbury during the most sunny months:
Months with the longest average daylight duration in Town of Glastenbury:
The largest precipitation sum in Town of Glastenbury is at