| 2023 Hardiness Zone: | 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. 21 - Oct. 31 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 70b - Monongahela Transition Zone |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 15025 - Clairton, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 21 | 29 | 38 | 49 | 58 | 62 | 61 | 54 | 43 | 34 | 26 | 41 |
| Avg Max Temp (°F) | 37 | 40 | 51 | 62 | 72 | 80 | 84 | 82 | 76 | 65 | 52 | 42 | 62 |
| Avg Precip (In.) | 2.69 | 2.36 | 3.3 | 3.24 | 3.97 | 3.87 | 4.11 | 3.55 | 3.36 | 2.4 | 3.11 | 2.83 | 38.8 |