Average annual temperature is 15.0 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -8.4 °C
Number of sunny days: 186 days
Number of rainy days: 179 days
Look at detailed online map of Dewey Beach
* Weather data for Dewey Beach 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) | 19.7 | 20.9 | 22.4 | 30.6 | 27.9 | 29.1 | 36.4 | 35.2 | 33.7 | 27.5 | 23.6 | 18.1 |
| Average daytime temperature (°C) | 11.0 | 11.6 | 12.8 | 20.3 | 19.7 | 25.0 | 30.5 | 29.2 | 25.7 | 21.2 | 14.1 | 11.2 |
| Average temperature (°C) | 7.1 | 7.3 | 7.8 | 15.0 | 15.9 | 20.7 | 25.9 | 24.8 | 21.9 | 16.3 | 9.4 | 7.5 |
| Average night temperature (°C) | 4.0 | 3.4 | 3.7 | 10.9 | 12.7 | 16.8 | 22.1 | 21.2 | 18.6 | 12.5 | 5.9 | 4.2 |
| Absolute minimum temperature (°C) | -1.3 | -8.4 | -1.7 | 3.7 | 6.1 | 11.6 | 18.9 | 17.8 | 13.8 | 6.2 | -4.0 | -1.7 |
| 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 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 5.3 | 7.2 | 7.9 | 9.8 | 11.3 | 11.4 | 12.0 | 10.6 | 9.0 | 9.0 | 7.6 | 5.8 |
| Precipitation (mm) | 75 | 53 | 55 | 143 | 98 | 176 | 93 | 48 | 136 | 57 | 44 | 153 |
| Sunny days | 11 | 17 | 14 | 19 | 17 | 13 | 8 | 12 | 14 | 21 | 23 | 17 |
| Rainy days | 20 | 11 | 17 | 11 | 14 | 17 | 23 | 19 | 16 | 10 | 7 | 14 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Dewey Beach during the most sunny months:
The largest precipitation sum in Dewey Beach is at