| 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. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 67e - Anthracite Subregion |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 18407 - Carbondale, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 13 | 22 | 33 | 43 | 52 | 57 | 55 | 47 | 36 | 29 | 18 | 35 |
| Avg Max Temp (°F) | 31 | 33 | 43 | 55 | 67 | 75 | 79 | 77 | 70 | 59 | 46 | 35 | 56 |
| Avg Precip (In.) | 3.19 | 2.58 | 3.19 | 3.68 | 4.22 | 4.26 | 4 | 3.56 | 4.05 | 3.27 | 3.62 | 3.2 | 42.84 |