Average annual temperature is 11.5 °C
Absolute maximum temperature: 41.1 °C
Absolute minimum temperature: -8.3 °C
Number of sunny days: 204 days
Number of rainy days: 154 days
Number of snow days: 7 days
Look at detailed online map of Allentown (historical)
* Weather data for Allentown (historical) 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) | 14.3 | 15.7 | 15.6 | 29.7 | 30.2 | 35.5 | 36.6 | 41.1 | 34.5 | 28.6 | 21.6 | 16.7 |
| Average daytime temperature (°C) | 9.6 | 10.0 | 7.7 | 14.3 | 21.0 | 26.1 | 32.1 | 32.4 | 24.3 | 20.0 | 14.1 | 12.1 |
| Average temperature (°C) | 4.1 | 3.2 | 2.7 | 7.8 | 13.7 | 17.1 | 22.2 | 22.7 | 16.4 | 12.5 | 7.9 | 7.0 |
| Average night temperature (°C) | 0.7 | -0.9 | -1.3 | 3.1 | 7.8 | 10.1 | 14.0 | 15.2 | 10.9 | 7.6 | 4.1 | 4.0 |
| Absolute minimum temperature (°C) | -5.0 | -8.3 | -7.9 | -4.9 | 0.1 | 4.3 | 10.2 | 10.2 | 5.6 | -0.6 | -3.4 | -2.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 13.0 | 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 | 13.8 | 12.5 | 11.1 | 9.8 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.1 | 6.9 | 6.1 | 8.6 | 11.5 | 13.1 | 13.8 | 12.5 | 9.9 | 8.2 | 6.2 | 4.0 |
| Precipitation (mm) | 295 | 139 | 281 | 118 | 53 | 23 | 0 | 5 | 92 | 69 | 122 | 216 |
| Sunny days | 13 | 10 | 4 | 11 | 19 | 23 | 31 | 28 | 20 | 18 | 15 | 12 |
| Rainy days | 18 | 13 | 25 | 19 | 12 | 7 | 0 | 3 | 10 | 13 | 15 | 19 |
| Snow days | 0 | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Allentown (historical) during the most sunny months:
The largest precipitation sum in Allentown (historical) is at