| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| 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: | 39d - Central Plateau |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65791 - Thayer, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 26 | 35 | 44 | 53 | 61 | 66 | 64 | 56 | 44 | 34 | 25 | 44 |
| Avg Max Temp (°F) | 45 | 51 | 61 | 70 | 78 | 85 | 91 | 89 | 82 | 72 | 58 | 48 | 69 |
| Avg Precip (In.) | 2.84 | 2.91 | 4.25 | 4.39 | 4.15 | 3.71 | 3.2 | 3.06 | 3.62 | 3.56 | 5.05 | 4.05 | 44.78 |