Mexico, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.7 °F (low) to 64.2 °F (high). Annual precipitation averages 42.6 Inches. Mexico is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.4 °F | 37.2 °F | 2.2 in. |
| February | 22.7 °F | 42.0 °F | 2.34 in. |
| March | 32.2 °F | 53.4 °F | 2.94 in. |
| April | 42.9 °F | 65.0 °F | 4.44 in. |
| May | 53.7 °F | 74.3 °F | 5.3 in. |
| June | 63.0 °F | 83.1 °F | 4.96 in. |
| July | 66.7 °F | 86.9 °F | 4.27 in. |
| August | 65.0 °F | 86.6 °F | 3.68 in. |
| September | 56.2 °F | 79.4 °F | 4.19 in. |
| October | 44.4 °F | 67.2 °F | 3.22 in. |
| November | 34.0 °F | 53.8 °F | 2.84 in. |
| December | 24.7 °F | 41.6 °F | 2.25 in. |
| Annual | 43.7 °F | 64.2 °F | 42.63 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |