| 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 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55e - Darby Plains |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 43044 - Mechanicsburg, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 21 | 29 | 38 | 49 | 58 | 61 | 59 | 52 | 41 | 32 | 23 | 40 |
| Avg Max Temp (°F) | 35 | 40 | 51 | 63 | 73 | 82 | 85 | 84 | 78 | 66 | 51 | 40 | 62 |
| Avg Precip (In.) | 2.36 | 2.02 | 2.69 | 3.53 | 4.01 | 4.31 | 4.46 | 3.66 | 2.88 | 2.51 | 3.1 | 2.7 | 38.24 |