Average annual temperature is 12.6 °C
Absolute maximum temperature: 34.1 °C
Absolute minimum temperature: -10.7 °C
Number of sunny days: 172 days
Number of rainy days: 186 days
Number of snow days: 7 days
Look at detailed online map of Borough of Hummelstown
* Weather data for Borough of Hummelstown 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) | 16.6 | 18.9 | 20.7 | 30.0 | 29.1 | 33.9 | 34.1 | 31.9 | 33.5 | 27.1 | 21.4 | 16.2 |
| Average daytime temperature (°C) | 7.7 | 9.8 | 10.6 | 19.5 | 22.3 | 26.4 | 30.1 | 28.3 | 24.0 | 19.0 | 11.2 | 8.4 |
| Average temperature (°C) | 3.8 | 3.9 | 4.8 | 12.7 | 15.3 | 19.9 | 24.4 | 22.7 | 19.0 | 13.7 | 5.9 | 4.3 |
| Average night temperature (°C) | 0.8 | -0.7 | 0.2 | 7.2 | 8.7 | 14.4 | 19.4 | 18.1 | 14.7 | 9.4 | 1.9 | 1.1 |
| Absolute minimum temperature (°C) | -4.6 | -10.7 | -5.9 | -0.4 | 2.9 | 10.1 | 16.7 | 14.3 | 9.0 | 2.8 | -5.5 | -4.0 |
| 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 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 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) | 4.9 | 6.8 | 7.6 | 9.2 | 11.5 | 10.7 | 12.3 | 10.7 | 8.5 | 8.1 | 7.5 | 4.1 |
| Precipitation (mm) | 82 | 37 | 70 | 144 | 18 | 108 | 100 | 127 | 120 | 58 | 65 | 121 |
| Sunny days | 11 | 17 | 13 | 15 | 19 | 11 | 5 | 12 | 15 | 19 | 20 | 15 |
| Rainy days | 19 | 9 | 16 | 15 | 12 | 19 | 26 | 19 | 15 | 12 | 9 | 15 |
| Snow days | 1 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Borough of Hummelstown during the most sunny months:
The largest precipitation sum in Borough of Hummelstown is at