| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°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: | 61c - Low Lime Drift Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44851 - New London, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 18 | 27 | 36 | 47 | 56 | 60 | 58 | 51 | 41 | 32 | 22 | 39 |
| Avg Max Temp (°F) | 32 | 36 | 47 | 59 | 70 | 79 | 82 | 80 | 74 | 62 | 49 | 37 | 59 |
| Avg Precip (In.) | 2.33 | 2.05 | 2.8 | 3.4 | 3.88 | 4.07 | 3.94 | 3.87 | 3.3 | 2.44 | 3.12 | 2.83 | 38.03 |