| 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 5a: -20F to -15F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47f - Rolling Loess Prairies |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 64089 - Smithville, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 22 | 32 | 42 | 53 | 62 | 67 | 64 | 56 | 44 | 32 | 21 | 42 |
| Avg Max Temp (°F) | 37 | 43 | 55 | 66 | 76 | 85 | 89 | 88 | 80 | 69 | 53 | 41 | 65 |
| Avg Precip (In.) | 1.2 | 1.31 | 2.6 | 3.42 | 5.27 | 4.49 | 4.96 | 3.79 | 4.46 | 3.21 | 2.4 | 1.59 | 38.7 |