Average annual temperature is 15.9 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: -5.4 °C
Number of sunny days: 190 days
Number of rainy days: 175 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) | 18.8 | 24.9 | 26.3 | 29.0 | 29.6 | 33.3 | 35.5 | 35.1 | 33.6 | 28.4 | 27.6 | 21.3 |
| Average daytime temperature (°C) | 12.8 | 15.7 | 17.1 | 22.1 | 24.3 | 28.4 | 32.9 | 30.8 | 27.3 | 23.1 | 16.6 | 12.5 |
| Average temperature (°C) | 7.5 | 10.3 | 11.0 | 15.4 | 18.4 | 21.7 | 26.2 | 24.8 | 21.2 | 16.5 | 10.2 | 7.2 |
| Average night temperature (°C) | 3.4 | 5.8 | 5.6 | 9.2 | 13.1 | 16.2 | 20.5 | 20.0 | 16.2 | 11.2 | 5.3 | 2.9 |
| Absolute minimum temperature (°C) | -4.4 | -5.4 | -4.3 | 1.5 | 6.0 | 11.1 | 17.8 | 16.8 | 12.1 | 5.3 | -4.0 | -4.6 |
| 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) | 6.1 | 6.3 | 8.6 | 9.0 | 9.9 | 10.5 | 12.0 | 10.7 | 10.1 | 9.6 | 7.8 | 6.4 |
| Precipitation (mm) | 126 | 82 | 71 | 135 | 43 | 105 | 73 | 105 | 39 | 16 | 40 | 142 |
| Sunny days | 16 | 12 | 16 | 11 | 14 | 13 | 12 | 13 | 17 | 25 | 22 | 19 |
| Rainy days | 15 | 16 | 15 | 19 | 17 | 17 | 19 | 18 | 13 | 6 | 8 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Johnstown during the most sunny months:
The largest precipitation sum in Johnstown is at