| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| 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 16214 - Clarion, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 15 | 23 | 32 | 42 | 51 | 56 | 55 | 48 | 37 | 29 | 20 | 35 |
| Avg Max Temp (°F) | 33 | 37 | 47 | 60 | 71 | 79 | 82 | 81 | 73 | 62 | 48 | 37 | 59 |
| Avg Precip (In.) | 2.94 | 2.5 | 3.34 | 3.78 | 4.09 | 5.34 | 4.76 | 4.34 | 4.61 | 3.26 | 3.89 | 3.33 | 46.18 |