Average annual temperature is 14.7 °C
Absolute maximum temperature: 40.2 °C
Absolute minimum temperature: -12.8 °C
Number of sunny days: 208 days
Number of rainy days: 156 days
Number of snow days: 1 day
Look at detailed online map of Hercules
* Weather data for Hercules 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) | 18.9 | 22.3 | 22.8 | 27.0 | 30.8 | 37.1 | 37.1 | 40.2 | 32.8 | 30.0 | 26.4 | 17.1 |
| Average daytime temperature (°C) | 9.4 | 12.3 | 14.3 | 20.2 | 25.9 | 30.1 | 32.4 | 31.9 | 28.6 | 21.0 | 14.8 | 10.7 |
| Average temperature (°C) | 4.1 | 5.8 | 7.8 | 13.5 | 19.1 | 23.3 | 25.8 | 25.5 | 21.6 | 15.3 | 8.8 | 5.6 |
| Average night temperature (°C) | 0.3 | 0.8 | 3.1 | 7.6 | 13.4 | 17.1 | 20.6 | 20.5 | 15.9 | 11.1 | 4.0 | 2.0 |
| Absolute minimum temperature (°C) | -8.6 | -12.8 | -7.6 | 0.9 | 4.8 | 11.6 | 15.5 | 12.9 | 10.7 | -3.9 | -6.5 | -5.1 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| 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) | 5.7 | 7.4 | 7.7 | 10.2 | 10.8 | 12.9 | 11.6 | 11.0 | 10.8 | 8.1 | 7.8 | 6.3 |
| Precipitation (mm) | 88 | 93 | 258 | 58 | 117 | 55 | 63 | 88 | 41 | 68 | 22 | 59 |
| Sunny days | 18 | 18 | 13 | 21 | 14 | 17 | 13 | 16 | 20 | 19 | 21 | 18 |
| Rainy days | 13 | 10 | 18 | 9 | 17 | 13 | 18 | 15 | 10 | 12 | 9 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Hercules during the most sunny months:
The largest precipitation sum in Hercules is at