| 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. 21 - Oct. 31 |
| Average Last Frost Date: | May 1 - May 10 |
| 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 44857 - Norwalk, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 27 | 37 | 48 | 57 | 62 | 60 | 52 | 41 | 33 | 23 | 40 |
| Avg Max Temp (°F) | 33 | 36 | 46 | 58 | 69 | 79 | 83 | 81 | 74 | 62 | 49 | 37 | 59 |
| Avg Precip (In.) | 2.19 | 1.84 | 2.7 | 3.29 | 3.58 | 4.24 | 3.89 | 3.86 | 3.21 | 2.35 | 2.92 | 2.76 | 36.83 |