| 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. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 57a - Maumee Lake Plains |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 45833 - Delphos, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 19 | 28 | 38 | 49 | 59 | 62 | 60 | 53 | 42 | 33 | 22 | 40 |
| Avg Max Temp (°F) | 32 | 36 | 47 | 60 | 71 | 81 | 84 | 82 | 76 | 63 | 49 | 37 | 60 |
| Avg Precip (In.) | 2.1 | 1.89 | 2.66 | 3.39 | 3.76 | 4.04 | 3.86 | 3.43 | 2.96 | 2.43 | 2.96 | 2.62 | 36.1 |