| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 83a - Erie Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44089 - Vermilion, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 38 | 50 | 59 | 64 | 62 | 55 | 44 | 34 | 24 | 41 |
| Avg Max Temp (°F) | 32 | 35 | 45 | 57 | 68 | 78 | 82 | 81 | 74 | 62 | 49 | 37 | 58 |
| Avg Precip (In.) | 2.15 | 1.87 | 2.63 | 3.21 | 3.48 | 3.95 | 3.63 | 3.75 | 3.31 | 2.44 | 2.97 | 2.75 | 36.12 |