| 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. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 40e - Claypan Prairie |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65265 - Mexico, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 21 | 30 | 41 | 51 | 61 | 66 | 63 | 55 | 43 | 32 | 22 | 42 |
| Avg Max Temp (°F) | 35 | 42 | 53 | 65 | 75 | 84 | 89 | 87 | 79 | 68 | 53 | 40 | 64 |
| Avg Precip (In.) | 1.65 | 1.95 | 3.19 | 3.76 | 4.98 | 4.36 | 3.76 | 3.46 | 3.47 | 2.99 | 3.53 | 2.49 | 39.6 |