| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°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 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55b - Loamy High Lime Till Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 43311 - Bellefontaine, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 19 | 28 | 38 | 49 | 58 | 62 | 60 | 53 | 41 | 31 | 21 | 40 |
| Avg Max Temp (°F) | 32 | 37 | 47 | 59 | 70 | 79 | 83 | 81 | 74 | 63 | 49 | 37 | 59 |
| Avg Precip (In.) | 2.24 | 1.99 | 2.7 | 3.48 | 3.98 | 4.09 | 4 | 3.59 | 2.77 | 2.48 | 3.06 | 2.86 | 37.24 |