| 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 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 40a - Loess Flats and Till Plains |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 64085 - Richmond, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 21 | 31 | 41 | 52 | 61 | 66 | 63 | 54 | 43 | 31 | 20 | 42 |
| Avg Max Temp (°F) | 35 | 42 | 54 | 65 | 75 | 84 | 89 | 88 | 80 | 68 | 52 | 40 | 64 |
| Avg Precip (In.) | 1.42 | 1.53 | 2.78 | 3.7 | 4.94 | 4.35 | 4.46 | 3.67 | 4.36 | 3.45 | 3 | 1.9 | 39.56 |