Average annual temperature is 21.0 °C
Absolute maximum temperature: 38.0 °C
Absolute minimum temperature: -1.0 °C
Number of sunny days: 157 days
Number of rainy days: 208 days
Look at detailed online map of Johnstown
* Weather data for Johnstown 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) | 27.9 | 29.4 | 30.2 | 32.5 | 34.5 | 36.1 | 36.6 | 38.0 | 34.3 | 29.6 | 28.9 | 26.0 |
| Average daytime temperature (°C) | 21.0 | 24.7 | 25.5 | 28.1 | 29.1 | 31.6 | 34.2 | 34.1 | 31.6 | 26.7 | 22.2 | 19.1 |
| Average temperature (°C) | 14.3 | 17.7 | 18.6 | 21.4 | 22.7 | 25.2 | 27.7 | 27.9 | 25.0 | 20.9 | 16.6 | 14.0 |
| Average night temperature (°C) | 9.2 | 13.0 | 13.7 | 16.3 | 17.8 | 20.9 | 23.4 | 23.7 | 20.7 | 16.4 | 12.7 | 10.3 |
| Absolute minimum temperature (°C) | -1.0 | 3.5 | 3.3 | 9.8 | 12.0 | 16.7 | 21.1 | 22.0 | 16.5 | 8.4 | 2.1 | 1.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.5 | 11.1 | 12.0 | 12.9 | 13.7 | 14.0 | 13.9 | 13.2 | 12.3 | 11.4 | 10.7 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.2 | 8.8 | 9.3 | 9.9 | 11.0 | 10.7 | 11.3 | 11.4 | 10.3 | 9.4 | 6.6 | 6.7 |
| Precipitation (mm) | 55 | 35 | 83 | 65 | 76 | 160 | 113 | 148 | 102 | 56 | 68 | 98 |
| Sunny days | 17 | 21 | 16 | 10 | 13 | 5 | 6 | 7 | 10 | 19 | 17 | 16 |
| Rainy days | 14 | 7 | 15 | 20 | 18 | 25 | 25 | 24 | 20 | 12 | 13 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Johnstown is at