Average annual temperature is 10.3 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -27.4 °C
Number of sunny days: 200 days
Number of rainy days: 138 days
Number of snow days: 27 days
Look at detailed online map of Delaware County
* Weather data for Delaware County 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) | 7.4 | 9.5 | 21.3 | 25.0 | 30.7 | 32.2 | 32.8 | 37.0 | 33.7 | 29.2 | 16.9 | 12.1 |
| Average daytime temperature (°C) | 0.2 | 2.7 | 6.5 | 15.3 | 23.2 | 27.8 | 27.7 | 27.8 | 24.8 | 16.0 | 8.7 | 5.4 |
| Average temperature (°C) | -3.7 | -2.7 | 1.2 | 8.9 | 16.6 | 21.8 | 22.3 | 22.6 | 19.3 | 11.6 | 3.7 | 1.2 |
| Average night temperature (°C) | -6.5 | -7.0 | -2.9 | 3.7 | 10.4 | 15.8 | 17.0 | 17.7 | 14.6 | 7.7 | -0.1 | -1.4 |
| Absolute minimum temperature (°C) | -27.4 | -23.4 | -15.0 | -4.3 | 1.5 | 8.1 | 11.7 | 11.2 | 8.8 | -4.9 | -13.7 | -8.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.1 | 7.0 | 6.7 | 9.1 | 12.1 | 12.4 | 12.5 | 11.6 | 9.8 | 7.1 | 7.2 | 4.3 |
| Precipitation (mm) | 65 | 62 | 86 | 71 | 59 | 28 | 94 | 34 | 52 | 111 | 18 | 41 |
| Sunny days | 17 | 17 | 15 | 18 | 24 | 13 | 14 | 15 | 12 | 18 | 22 | 15 |
| Rainy days | 6 | 8 | 11 | 11 | 7 | 17 | 17 | 16 | 18 | 12 | 6 | 9 |
| Snow days | 8 | 3 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 7 |
The best time to visit Delaware County during the most sunny months:
The largest precipitation sum in Delaware County is at