| 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: | 70c - Pittsburgh Low Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16061 - West Sunbury, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 17 | 24 | 33 | 43 | 52 | 57 | 55 | 48 | 37 | 29 | 21 | 36 |
| Avg Max Temp (°F) | 34 | 38 | 48 | 60 | 70 | 78 | 82 | 81 | 74 | 62 | 50 | 39 | 60 |
| Avg Precip (In.) | 2.73 | 2.33 | 3.24 | 3.39 | 3.86 | 4.73 | 4.34 | 3.97 | 3.88 | 2.85 | 3.43 | 3.09 | 41.84 |