| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°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. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 67e - Anthracite Subregion |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 18447 - Olyphant, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 16 | 24 | 34 | 44 | 53 | 58 | 56 | 49 | 38 | 30 | 21 | 37 |
| Avg Max Temp (°F) | 33 | 35 | 44 | 57 | 69 | 77 | 81 | 79 | 72 | 60 | 48 | 37 | 57 |
| Avg Precip (In.) | 2.7 | 2.24 | 2.81 | 3.36 | 3.84 | 4.34 | 3.92 | 3.31 | 3.86 | 3.08 | 3.24 | 2.71 | 39.41 |