| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°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. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 69b - Uplands and Valleys of Mixed Land Use |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 15501 - Somerset, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 17 | 25 | 34 | 44 | 53 | 58 | 57 | 50 | 38 | 30 | 20 | 37 |
| Avg Max Temp (°F) | 32 | 36 | 45 | 57 | 67 | 74 | 78 | 77 | 70 | 59 | 47 | 37 | 57 |
| Avg Precip (In.) | 3.25 | 2.82 | 3.6 | 3.86 | 4.24 | 4.08 | 3.72 | 3.72 | 3.8 | 2.87 | 3.56 | 3.12 | 42.63 |