Average annual temperature is 19.3 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: -2.1 °C
Number of sunny days: 170 days
Number of rainy days: 195 days
Look at detailed online map of Norristown
* Weather data for Norristown 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) | 23.9 | 28.3 | 30.1 | 32.0 | 31.8 | 35.7 | 37.5 | 37.3 | 33.5 | 28.9 | 26.1 | 23.8 |
| Average daytime temperature (°C) | 17.5 | 21.0 | 23.0 | 25.9 | 27.2 | 31.2 | 34.7 | 34.1 | 29.5 | 24.5 | 19.3 | 16.0 |
| Average temperature (°C) | 11.6 | 15.2 | 16.3 | 19.3 | 21.3 | 25.1 | 28.3 | 27.9 | 23.7 | 18.8 | 13.6 | 10.8 |
| Average night temperature (°C) | 7.0 | 10.8 | 10.8 | 13.7 | 16.4 | 20.2 | 23.4 | 23.3 | 19.1 | 14.1 | 9.4 | 6.7 |
| Absolute minimum temperature (°C) | -2.1 | 0.7 | -0.1 | 7.4 | 9.6 | 15.7 | 21.5 | 20.5 | 15.1 | 7.6 | -0.4 | -0.9 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.3 | 11.0 | 12.0 | 13.0 | 13.8 | 14.2 | 14.0 | 13.3 | 12.4 | 11.4 | 10.5 | 10.1 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.7 | 7.6 | 8.5 | 9.9 | 9.9 | 10.7 | 11.1 | 11.3 | 10.1 | 8.9 | 7.1 | 6.6 |
| Precipitation (mm) | 149 | 109 | 88 | 95 | 90 | 156 | 141 | 170 | 47 | 73 | 69 | 131 |
| Sunny days | 17 | 14 | 15 | 13 | 9 | 9 | 5 | 7 | 15 | 25 | 18 | 23 |
| Rainy days | 14 | 14 | 16 | 17 | 22 | 21 | 26 | 24 | 15 | 6 | 12 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Norristown during the most sunny months:
The largest precipitation sum in Norristown is at