| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 40a - Loess Flats and Till Plains |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 64648 - Jamesport, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 28 | 39 | 50 | 60 | 64 | 62 | 52 | 41 | 29 | 18 | 39 |
| Avg Max Temp (°F) | 33 | 40 | 52 | 64 | 74 | 83 | 88 | 86 | 78 | 67 | 50 | 38 | 63 |
| Avg Precip (In.) | 1.16 | 1.17 | 2.58 | 3.42 | 4.86 | 3.95 | 4.43 | 3.84 | 4.2 | 3.11 | 2.48 | 1.64 | 36.83 |