Richmond, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.5 °F (low) to 61.7 °F (high). Annual precipitation averages 42 Inches. Richmond is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.3 °F | 36.8 °F | 3.23 in. |
| February | 22.7 °F | 39.8 °F | 2.45 in. |
| March | 30.2 °F | 49.5 °F | 3.33 in. |
| April | 40.7 °F | 62.9 °F | 3.71 in. |
| May | 50.7 °F | 72.2 °F | 4.05 in. |
| June | 59.3 °F | 79.7 °F | 4.56 in. |
| July | 63.2 °F | 83.2 °F | 4.23 in. |
| August | 61.7 °F | 82.6 °F | 3.68 in. |
| September | 55.1 °F | 76.5 °F | 3.66 in. |
| October | 44.1 °F | 64.4 °F | 3.09 in. |
| November | 34.4 °F | 52.0 °F | 2.94 in. |
| December | 26.7 °F | 41.2 °F | 3.11 in. |
| Annual | 42.5 °F | 61.7 °F | 42.04 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |