Richmond, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43 °F (low) to 64.4 °F (high). Annual precipitation averages 42.5 Inches. Richmond is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.0 °F | 37.4 °F | 1.39 in. |
| February | 22.2 °F | 42.8 °F | 1.86 in. |
| March | 31.8 °F | 54.1 °F | 2.76 in. |
| April | 42.1 °F | 64.9 °F | 4.24 in. |
| May | 53.0 °F | 74.5 °F | 5.69 in. |
| June | 63.0 °F | 83.4 °F | 5.36 in. |
| July | 66.9 °F | 87.4 °F | 4.8 in. |
| August | 64.5 °F | 86.5 °F | 4.32 in. |
| September | 55.7 °F | 78.9 °F | 4.52 in. |
| October | 43.8 °F | 67.4 °F | 3.6 in. |
| November | 32.3 °F | 53.2 °F | 2.25 in. |
| December | 22.8 °F | 41.7 °F | 1.71 in. |
| Annual | 43 °F | 64.4 °F | 42.5 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |