| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°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: | 57a - Maumee Lake Plains |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 43619 - Northwood, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 23 | 31 | 41 | 52 | 62 | 67 | 65 | 57 | 46 | 36 | 26 | 44 |
| Avg Max Temp (°F) | 32 | 36 | 46 | 59 | 72 | 81 | 85 | 82 | 76 | 63 | 50 | 37 | 60 |
| Avg Precip (In.) | 1.95 | 1.95 | 2.6 | 3.25 | 3.09 | 3.83 | 3.14 | 3.12 | 2.73 | 2.43 | 2.96 | 2.6 | 33.66 |