| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 40c - Wooded Osage Plains |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 64029 - Grain Valley, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 22 | 32 | 43 | 53 | 62 | 67 | 65 | 56 | 45 | 32 | 22 | 43 |
| Avg Max Temp (°F) | 36 | 43 | 55 | 65 | 75 | 84 | 89 | 87 | 79 | 69 | 53 | 41 | 65 |
| Avg Precip (In.) | 1.39 | 1.5 | 2.8 | 3.71 | 5.06 | 4.97 | 4.43 | 3.65 | 4.64 | 3.51 | 2.98 | 1.82 | 40.47 |