| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 62c - Glaciated Allegheney High Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16950 - Westfield, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 12 | 22 | 31 | 42 | 50 | 54 | 52 | 45 | 35 | 28 | 18 | 34 |
| Avg Max Temp (°F) | 31 | 33 | 43 | 55 | 67 | 76 | 80 | 78 | 71 | 60 | 47 | 36 | 56 |
| Avg Precip (In.) | 1.81 | 1.73 | 2.36 | 2.8 | 3.19 | 4.41 | 3.41 | 3.01 | 3.41 | 2.88 | 2.86 | 2.15 | 34 |