| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 70b - Monongahela Transition Zone |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 15370 - Waynesburg, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 19 | 27 | 35 | 45 | 55 | 59 | 58 | 50 | 38 | 30 | 23 | 38 |
| Avg Max Temp (°F) | 38 | 41 | 52 | 62 | 72 | 80 | 83 | 82 | 76 | 65 | 53 | 42 | 62 |
| Avg Precip (In.) | 2.9 | 2.5 | 3.49 | 3.28 | 4.18 | 3.74 | 4.09 | 3.91 | 3.23 | 2.56 | 3.22 | 2.8 | 39.89 |