| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 70c - Pittsburgh Low Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16232 - Knox, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 16 | 23 | 32 | 43 | 51 | 56 | 55 | 48 | 37 | 29 | 21 | 36 |
| Avg Max Temp (°F) | 33 | 37 | 48 | 60 | 71 | 79 | 82 | 81 | 74 | 62 | 49 | 38 | 59 |
| Avg Precip (In.) | 2.88 | 2.47 | 3.35 | 3.7 | 3.99 | 5.26 | 4.74 | 4.28 | 4.46 | 3.23 | 3.76 | 3.27 | 45.38 |