| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | 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. 11 - Apr. 20 |
| 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 64865 - Seneca, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 27 | 36 | 45 | 54 | 63 | 68 | 65 | 58 | 46 | 36 | 26 | 46 |
| Avg Max Temp (°F) | 44 | 50 | 60 | 70 | 77 | 85 | 90 | 90 | 82 | 72 | 58 | 47 | 69 |
| Avg Precip (In.) | 1.87 | 2.14 | 3.79 | 4.15 | 5.22 | 4.85 | 3.47 | 3.53 | 5.03 | 3.86 | 4.46 | 2.73 | 45.1 |