| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | 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: | 60b - Northeastern Uplands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 18470 - Union Dale, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 12 | 20 | 31 | 42 | 51 | 55 | 54 | 46 | 35 | 28 | 17 | 34 |
| Avg Max Temp (°F) | 29 | 32 | 41 | 53 | 65 | 73 | 78 | 76 | 68 | 57 | 45 | 33 | 54 |
| Avg Precip (In.) | 3.35 | 2.8 | 3.44 | 4.02 | 4.59 | 4.7 | 4.25 | 4.02 | 4.29 | 3.98 | 4.14 | 3.55 | 47.12 |