| 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 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 61c - Low Lime Drift Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16134 - Jamestown, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 16 | 24 | 34 | 44 | 54 | 57 | 56 | 49 | 38 | 31 | 21 | 37 |
| Avg Max Temp (°F) | 33 | 36 | 46 | 58 | 69 | 78 | 82 | 80 | 73 | 62 | 49 | 38 | 59 |
| Avg Precip (In.) | 2.46 | 2.26 | 2.98 | 3.5 | 3.75 | 4.3 | 4.21 | 3.99 | 4.08 | 3.05 | 3.59 | 3.18 | 41.33 |