| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 69b - Uplands and Valleys of Mixed Land Use |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 15902 - Johnstown, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 21 | 28 | 37 | 47 | 55 | 59 | 58 | 51 | 40 | 32 | 23 | 39 |
| Avg Max Temp (°F) | 36 | 39 | 49 | 61 | 72 | 80 | 84 | 82 | 75 | 63 | 51 | 40 | 61 |
| Avg Precip (In.) | 3.8 | 3.41 | 3.93 | 3.83 | 4.42 | 4.87 | 5.12 | 4.13 | 4.17 | 3.27 | 3.73 | 3.38 | 48.06 |