| 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 |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| 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 15666 - Mount Pleasant, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 20 | 28 | 37 | 47 | 56 | 60 | 59 | 52 | 41 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 36 | 40 | 50 | 61 | 71 | 79 | 83 | 82 | 75 | 64 | 52 | 41 | 61 |
| Avg Precip (In.) | 2.91 | 2.65 | 3.42 | 3.55 | 4.18 | 3.98 | 4.2 | 4.02 | 3.78 | 2.61 | 3.51 | 3.01 | 41.82 |