| 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 |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 61c - Low Lime Drift Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 16115 - Darlington, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 19 | 27 | 36 | 46 | 55 | 60 | 58 | 52 | 40 | 32 | 23 | 39 |
| Avg Max Temp (°F) | 35 | 39 | 49 | 61 | 72 | 79 | 83 | 81 | 75 | 63 | 51 | 40 | 61 |
| Avg Precip (In.) | 2.51 | 2.2 | 3.02 | 3.19 | 3.87 | 4.05 | 4.06 | 3.37 | 3.38 | 2.37 | 3.08 | 2.87 | 37.96 |