| 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 1b: -15F to -10F |
| 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: | 62d - Unglaciated Allegheney High Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16301 - Oil City, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 16 | 24 | 33 | 43 | 53 | 57 | 56 | 49 | 38 | 31 | 21 | 36 |
| Avg Max Temp (°F) | 34 | 37 | 47 | 59 | 70 | 79 | 82 | 81 | 73 | 62 | 49 | 38 | 59 |
| Avg Precip (In.) | 2.66 | 2.35 | 3.25 | 3.56 | 3.87 | 4.94 | 4.73 | 4.15 | 4.26 | 3.11 | 3.59 | 3.18 | 43.65 |