Average annual temperature is 14.6 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: -8.9 °C
Number of sunny days: 192 days
Number of rainy days: 171 days
Number of snow days: 2 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) | 17.1 | 19.3 | 20.2 | 28.3 | 26.2 | 28.7 | 35.8 | 33.8 | 35.5 | 26.8 | 20.7 | 16.2 |
| Average daytime temperature (°C) | 9.6 | 10.3 | 12.1 | 19.3 | 21.5 | 25.9 | 30.3 | 29.3 | 25.9 | 20.6 | 13.0 | 10.2 |
| Average temperature (°C) | 6.2 | 6.0 | 7.0 | 14.3 | 16.2 | 20.8 | 26.0 | 24.8 | 21.6 | 16.0 | 8.6 | 6.7 |
| Average night temperature (°C) | 3.4 | 2.1 | 2.6 | 10.2 | 11.6 | 16.5 | 22.3 | 21.2 | 17.9 | 12.3 | 5.0 | 3.6 |
| Absolute minimum temperature (°C) | -3.0 | -8.9 | -3.2 | 3.0 | 5.8 | 10.7 | 19.5 | 17.5 | 13.0 | 5.9 | -3.3 | -2.1 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 5.0 | 6.8 | 7.6 | 9.6 | 11.3 | 11.0 | 12.0 | 10.4 | 8.7 | 8.8 | 7.8 | 5.2 |
| Precipitation (mm) | 73 | 54 | 84 | 156 | 57 | 87 | 86 | 82 | 89 | 33 | 57 | 188 |
| Sunny days | 15 | 16 | 17 | 18 | 20 | 14 | 8 | 11 | 15 | 19 | 21 | 18 |
| Rainy days | 16 | 11 | 14 | 12 | 11 | 16 | 23 | 20 | 15 | 12 | 8 | 13 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Greenwich during the most sunny months:
The largest precipitation sum in Greenwich is at