| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| 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: | 70b - Monongahela Transition Zone |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 43944 - Richmond, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 21 | 28 | 38 | 48 | 57 | 61 | 60 | 53 | 42 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 36 | 40 | 50 | 61 | 71 | 79 | 83 | 81 | 75 | 64 | 51 | 40 | 61 |
| Avg Precip (In.) | 2.74 | 2.37 | 3.25 | 3.26 | 4.08 | 4.14 | 4.29 | 3.67 | 3.2 | 2.51 | 3.09 | 2.82 | 39.44 |