Average annual temperature is 10.0 °C
Absolute maximum temperature: 33.9 °C
Absolute minimum temperature: -27.3 °C
Number of sunny days: 132 days
Number of rainy days: 208 days
Number of snow days: 25 days
Look at detailed online map of Town of Greenwich
* Weather data for Town of Greenwich 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) | 9.3 | 14.5 | 16.1 | 28.6 | 30.8 | 33.9 | 32.0 | 27.0 | 31.4 | 28.5 | 16.6 | 14.9 |
| Average daytime temperature (°C) | 3.3 | 4.5 | 6.6 | 16.6 | 21.3 | 24.3 | 27.8 | 24.8 | 23.0 | 17.5 | 7.7 | 5.9 |
| Average temperature (°C) | -0.3 | -1.4 | 1.2 | 9.8 | 13.7 | 18.5 | 22.4 | 20.0 | 17.7 | 12.8 | 2.9 | 2.0 |
| Average night temperature (°C) | -3.4 | -6.5 | -3.9 | 4.3 | 7.3 | 13.5 | 18.1 | 15.9 | 13.5 | 9.1 | -0.4 | -0.7 |
| Absolute minimum temperature (°C) | -8.8 | -27.3 | -11.3 | -3.9 | 0.9 | 7.9 | 13.2 | 10.7 | 4.2 | 0.3 | -6.3 | -7.8 |
| 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 | 9.7 | 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 | 8.0 |
| Sunshine mean duration (h) | 3.6 | 5.9 | 6.5 | 8.0 | 11.6 | 9.6 | 10.5 | 10.1 | 8.3 | 6.2 | 6.2 | 4.1 |
| Precipitation (mm) | 116 | 55 | 113 | 115 | 59 | 130 | 279 | 178 | 89 | 114 | 61 | 165 |
| Sunny days | 7 | 9 | 10 | 13 | 18 | 10 | 4 | 6 | 13 | 12 | 16 | 14 |
| Rainy days | 17 | 11 | 17 | 17 | 13 | 20 | 27 | 25 | 17 | 19 | 10 | 15 |
| Snow days | 7 | 8 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 2 |
The best time to visit Town of Greenwich during the most sunny months:
Months with the longest average daylight duration in Town of Greenwich:
The largest precipitation sum in Town of Greenwich is at