| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°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 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 60a - Glaciated Low Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 18411 - Clarks Summit, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 16 | 25 | 34 | 44 | 53 | 58 | 57 | 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.) | 2.9 | 2.47 | 3.11 | 3.66 | 4.14 | 4.39 | 3.97 | 3.59 | 4.17 | 3.4 | 3.57 | 2.99 | 42.37 |