| 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. 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 43031 - Johnstown, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 20 | 28 | 37 | 48 | 57 | 61 | 59 | 52 | 40 | 31 | 23 | 39 |
| Avg Max Temp (°F) | 34 | 38 | 50 | 61 | 72 | 80 | 83 | 81 | 75 | 64 | 50 | 39 | 61 |
| Avg Precip (In.) | 2.62 | 2.26 | 3 | 3.56 | 4.1 | 4.4 | 4.35 | 3.91 | 3.13 | 2.62 | 3.35 | 2.96 | 40.27 |