| 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 Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 70c - Pittsburgh Low Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16052 - Prospect, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 17 | 25 | 33 | 44 | 53 | 57 | 56 | 49 | 38 | 30 | 22 | 36 |
| Avg Max Temp (°F) | 34 | 38 | 47 | 59 | 70 | 78 | 82 | 80 | 74 | 62 | 50 | 39 | 60 |
| Avg Precip (In.) | 2.68 | 2.31 | 3.2 | 3.32 | 3.88 | 4.47 | 4.22 | 3.76 | 3.73 | 2.71 | 3.33 | 3.03 | 40.64 |