Average annual temperature is 12.4 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: -15.9 °C
Number of sunny days: 175 days
Number of rainy days: 182 days
Number of snow days: 8 days
Look at detailed online map of Delaware
* Weather data for Delaware 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) | 17.7 | 17.9 | 16.4 | 31.3 | 30.2 | 35.4 | 33.6 | 30.5 | 34.5 | 28.0 | 19.5 | 15.8 |
| Average daytime temperature (°C) | 7.7 | 8.5 | 10.1 | 18.9 | 22.7 | 26.0 | 29.9 | 27.4 | 24.1 | 19.2 | 10.6 | 8.5 |
| Average temperature (°C) | 4.0 | 2.8 | 4.5 | 12.3 | 15.5 | 19.8 | 24.0 | 22.0 | 18.9 | 13.9 | 5.5 | 4.3 |
| Average night temperature (°C) | 0.6 | -1.6 | -0.1 | 7.0 | 8.6 | 14.4 | 19.1 | 17.4 | 14.7 | 9.6 | 1.2 | 1.2 |
| Absolute minimum temperature (°C) | -4.0 | -15.9 | -7.1 | -1.3 | 3.2 | 8.7 | 13.8 | 13.2 | 8.1 | 3.6 | -4.8 | -5.6 |
| 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) | 4.5 | 6.7 | 7.3 | 8.7 | 11.7 | 10.4 | 11.7 | 10.0 | 8.1 | 8.0 | 7.4 | 4.3 |
| Precipitation (mm) | 126 | 42 | 78 | 112 | 37 | 112 | 137 | 94 | 133 | 50 | 73 | 190 |
| Sunny days | 12 | 16 | 13 | 15 | 22 | 12 | 7 | 13 | 15 | 17 | 19 | 14 |
| Rainy days | 18 | 8 | 18 | 15 | 9 | 18 | 24 | 18 | 15 | 14 | 11 | 14 |
| Snow days | 1 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Delaware during the most sunny months:
The largest precipitation sum in Delaware is at