| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| 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: | 67a - Northern Limestone/Dolomite Valleys |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 17222 - Fayetteville, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 22 | 30 | 39 | 49 | 58 | 62 | 61 | 54 | 42 | 34 | 25 | 41 |
| Avg Max Temp (°F) | 38 | 41 | 50 | 63 | 72 | 79 | 84 | 82 | 75 | 64 | 52 | 42 | 62 |
| Avg Precip (In.) | 3.34 | 2.82 | 3.79 | 3.65 | 4.32 | 4.11 | 3.59 | 3.43 | 4.01 | 3.29 | 3.54 | 3.23 | 43.12 |