Average annual temperature is 11.4 °C
Absolute maximum temperature: 32.6 °C
Absolute minimum temperature: -12.0 °C
Number of sunny days: 152 days
Number of rainy days: 197 days
Number of snow days: 16 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) | 14.6 | 20.1 | 19.3 | 26.5 | 30.2 | 31.9 | 32.6 | 31.3 | 32.4 | 27.2 | 18.0 | 14.7 |
| Average daytime temperature (°C) | 6.2 | 10.0 | 9.1 | 17.2 | 21.4 | 25.3 | 28.6 | 26.7 | 24.0 | 17.4 | 10.2 | 7.9 |
| Average temperature (°C) | 2.2 | 2.9 | 3.5 | 10.5 | 14.7 | 19.0 | 22.4 | 20.7 | 18.2 | 12.5 | 5.1 | 4.0 |
| Average night temperature (°C) | -0.6 | -1.8 | -0.7 | 5.0 | 8.7 | 13.6 | 17.6 | 16.0 | 13.6 | 8.7 | 1.3 | 1.2 |
| Absolute minimum temperature (°C) | -7.0 | -12.0 | -8.0 | -3.3 | 1.4 | 8.6 | 13.8 | 11.0 | 8.1 | 0.5 | -7.8 | -5.3 |
| 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 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 2.9 | 6.5 | 6.5 | 8.7 | 10.5 | 10.9 | 11.6 | 11.1 | 9.0 | 6.8 | 6.7 | 3.9 |
| Precipitation (mm) | 149 | 53 | 124 | 72 | 74 | 102 | 94 | 95 | 33 | 77 | 44 | 69 |
| Sunny days | 8 | 13 | 11 | 14 | 20 | 13 | 6 | 11 | 13 | 13 | 18 | 12 |
| Rainy days | 16 | 14 | 14 | 16 | 11 | 17 | 25 | 20 | 17 | 18 | 11 | 18 |
| Snow days | 7 | 1 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Norristown during the most sunny months:
The largest precipitation sum in Norristown is at