| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47f - Rolling Loess Prairies |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65340 - Marshall, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 22 | 32 | 42 | 53 | 62 | 66 | 64 | 55 | 44 | 33 | 22 | 43 |
| Avg Max Temp (°F) | 35 | 42 | 54 | 65 | 74 | 83 | 88 | 87 | 79 | 68 | 53 | 40 | 64 |
| Avg Precip (In.) | 1.39 | 1.57 | 2.87 | 3.8 | 4.88 | 4.14 | 3.72 | 3.19 | 4.03 | 3.27 | 3.16 | 1.84 | 37.85 |