| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F 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: | 62d - Unglaciated Allegheney High Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16743 - Port Allegany, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 13 | 22 | 31 | 41 | 50 | 54 | 53 | 46 | 36 | 28 | 19 | 34 |
| Avg Max Temp (°F) | 31 | 34 | 44 | 56 | 68 | 75 | 79 | 77 | 70 | 59 | 46 | 35 | 56 |
| Avg Precip (In.) | 2.69 | 2.23 | 3.2 | 3.32 | 3.72 | 5.32 | 4.14 | 3.93 | 4.22 | 3.32 | 3.53 | 3.18 | 42.82 |