Average annual temperature is 11.5 °C
Absolute maximum temperature: 32.6 °C
Absolute minimum temperature: -11.3 °C
Number of sunny days: 163 days
Number of rainy days: 182 days
Number of snow days: 20 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) | 15.7 | 19.6 | 18.0 | 27.1 | 29.5 | 30.7 | 32.6 | 31.0 | 31.6 | 28.5 | 19.4 | 16.0 |
| Average daytime temperature (°C) | 5.2 | 9.2 | 8.5 | 16.8 | 21.1 | 24.9 | 27.7 | 26.3 | 23.7 | 17.2 | 10.4 | 8.3 |
| Average temperature (°C) | 1.7 | 2.5 | 3.3 | 10.6 | 14.7 | 19.3 | 22.6 | 20.9 | 18.7 | 12.9 | 5.4 | 4.5 |
| Average night temperature (°C) | -1.2 | -1.9 | -0.5 | 5.3 | 9.1 | 14.1 | 18.0 | 16.5 | 14.5 | 9.3 | 1.7 | 2.0 |
| Absolute minimum temperature (°C) | -10.7 | -11.3 | -7.9 | -3.0 | 1.5 | 8.3 | 13.5 | 10.3 | 8.5 | -2.9 | -7.5 | -4.8 |
| 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) | 2.8 | 6.9 | 6.4 | 9.1 | 10.9 | 11.0 | 11.9 | 10.6 | 9.1 | 6.7 | 6.9 | 3.7 |
| Precipitation (mm) | 141 | 68 | 93 | 98 | 60 | 97 | 84 | 146 | 40 | 61 | 39 | 71 |
| Sunny days | 7 | 16 | 10 | 14 | 23 | 14 | 8 | 12 | 18 | 14 | 17 | 10 |
| Rainy days | 17 | 10 | 15 | 16 | 8 | 16 | 23 | 19 | 12 | 16 | 11 | 19 |
| Snow days | 7 | 2 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 2 |
The best time to visit Greenwich during the most sunny months:
The largest precipitation sum in Greenwich is at