| 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: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 39a - Springfield Plateau |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65770 - Walnut Grove, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 25 | 34 | 43 | 54 | 63 | 68 | 66 | 57 | 46 | 35 | 25 | 45 |
| Avg Max Temp (°F) | 41 | 47 | 57 | 67 | 76 | 84 | 90 | 89 | 81 | 70 | 56 | 45 | 67 |
| Avg Precip (In.) | 1.9 | 2.2 | 3.73 | 4.22 | 4.89 | 4.85 | 3.69 | 3.49 | 4.61 | 3.83 | 4.26 | 2.93 | 44.61 |