| 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 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| 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 15909 - Johnstown, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 27 | 37 | 46 | 54 | 59 | 57 | 51 | 39 | 31 | 23 | 39 |
| Avg Max Temp (°F) | 35 | 38 | 48 | 61 | 71 | 79 | 83 | 81 | 74 | 63 | 50 | 39 | 60 |
| Avg Precip (In.) | 3.92 | 3.48 | 4.01 | 3.92 | 4.48 | 4.98 | 5.25 | 4.23 | 4.21 | 3.37 | 3.86 | 3.51 | 49.23 |