| 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. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| 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 16229 - Freeport, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 27 | 36 | 46 | 55 | 59 | 58 | 51 | 39 | 32 | 23 | 38 |
| Avg Max Temp (°F) | 36 | 39 | 50 | 61 | 72 | 80 | 83 | 82 | 75 | 64 | 51 | 41 | 61 |
| Avg Precip (In.) | 2.64 | 2.24 | 3.25 | 3.37 | 3.99 | 4.4 | 4.21 | 3.76 | 3.77 | 2.61 | 3.29 | 2.85 | 40.39 |