| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | October 11 - 20 | |
| Average Last Frost Date: | April 11 - 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 39c - White River Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65676 - Isabella, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 27 | 35 | 44 | 54 | 62 | 66 | 64 | 57 | 45 | 35 | 26 | 45 |
| Avg Max Temp (°F) | 45 | 51 | 61 | 70 | 78 | 85 | 91 | 90 | 82 | 73 | 59 | 48 | 69 |
| Avg Precip (In.) | 2.44 | 2.68 | 4.1 | 4.12 | 4.65 | 4.01 | 3.05 | 2.96 | 4 | 3.3 | 4.79 | 3.46 | 43.57 |