Average annual temperature is 12.0 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: -16.0 °C
Number of sunny days: 179 days
Number of rainy days: 172 days
Number of snow days: 14 days
Look at detailed online map of Greenwich
* Weather data for 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) | 16.8 | 14.2 | 20.8 | 26.4 | 33.2 | 34.6 | 33.9 | 35.4 | 32.4 | 28.5 | 22.2 | 15.2 |
| Average daytime temperature (°C) | 4.3 | 7.4 | 9.1 | 17.8 | 24.5 | 29.1 | 28.7 | 27.4 | 24.7 | 17.9 | 11.0 | 7.6 |
| Average temperature (°C) | 0.4 | 1.6 | 3.6 | 10.7 | 17.5 | 22.1 | 23.1 | 22.0 | 19.4 | 13.1 | 5.5 | 3.8 |
| Average night temperature (°C) | -2.4 | -2.4 | -0.5 | 4.9 | 11.5 | 15.7 | 18.0 | 17.5 | 15.1 | 9.4 | 1.2 | 1.1 |
| Absolute minimum temperature (°C) | -14.9 | -16.0 | -11.3 | -3.2 | 2.2 | 9.1 | 13.6 | 10.7 | 8.8 | -2.7 | -10.0 | -7.9 |
| 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 | 9.3 |
| 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) | 3.2 | 7.7 | 6.6 | 9.4 | 10.8 | 12.2 | 12.1 | 10.6 | 8.3 | 6.6 | 7.0 | 4.2 |
| Precipitation (mm) | 61 | 108 | 115 | 85 | 111 | 23 | 114 | 122 | 113 | 169 | 26 | 89 |
| Sunny days | 9 | 17 | 10 | 15 | 19 | 22 | 11 | 13 | 13 | 12 | 24 | 14 |
| Rainy days | 14 | 9 | 21 | 15 | 12 | 8 | 20 | 18 | 17 | 18 | 5 | 15 |
| Snow days | 8 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 |
The best time to visit Greenwich during the most sunny months:
The largest precipitation sum in Greenwich is at