Average annual temperature is 11.9 °C
Absolute maximum temperature: 37.4 °C
Absolute minimum temperature: -17.9 °C
Number of sunny days: 259 days
Number of rainy days: 85 days
Number of snow days: 21 days
Look at detailed online map of Allentown
* Weather data for Allentown 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) | 11.0 | 11.1 | 16.6 | 27.1 | 28.6 | 33.8 | 37.4 | 35.2 | 31.7 | 26.5 | 22.3 | 14.9 |
| Average daytime temperature (°C) | 2.1 | 4.1 | 9.4 | 19.3 | 24.5 | 28.3 | 34.8 | 30.8 | 27.3 | 22.0 | 13.8 | 8.2 |
| Average temperature (°C) | -3.4 | -2.7 | 3.1 | 11.1 | 17.3 | 21.3 | 28.0 | 23.9 | 20.2 | 14.6 | 6.8 | 1.5 |
| Average night temperature (°C) | -7.9 | -7.8 | -2.1 | 3.4 | 9.8 | 13.4 | 19.7 | 17.3 | 12.7 | 7.3 | 1.1 | -3.0 |
| Absolute minimum temperature (°C) | -17.9 | -17.1 | -11.2 | -7.6 | 5.2 | 9.1 | 15.9 | 14.8 | 8.5 | -1.8 | -10.1 | -8.1 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.1 | 8.9 | 8.9 | 11.6 | 12.6 | 13.3 | 13.0 | 11.7 | 11.0 | 10.3 | 8.6 | 7.8 |
| Precipitation (mm) | 50 | 43 | 80 | 3 | 14 | 1 | 1 | 30 | 9 | 0 | 28 | 23 |
| Sunny days | 17 | 16 | 14 | 25 | 23 | 28 | 27 | 16 | 19 | 29 | 22 | 23 |
| Rainy days | 7 | 6 | 10 | 5 | 8 | 2 | 4 | 15 | 11 | 2 | 8 | 7 |
| Snow days | 7 | 6 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Allentown during the most sunny months:
The largest precipitation sum in Allentown is at