Hayti, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.1 °F (low) to 69.5 °F (high). Annual precipitation averages 51.1 Inches. Hayti is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.6 °F | 45.0 °F | 3.72 in. |
| February | 31.8 °F | 50.1 °F | 4.21 in. |
| March | 39.7 °F | 59.5 °F | 4.93 in. |
| April | 49.5 °F | 70.5 °F | 5.44 in. |
| May | 59.9 °F | 79.3 °F | 5.51 in. |
| June | 68.1 °F | 87.3 °F | 3.83 in. |
| July | 71.4 °F | 89.9 °F | 3.89 in. |
| August | 69.1 °F | 88.9 °F | 2.95 in. |
| September | 61.5 °F | 83.1 °F | 3.32 in. |
| October | 49.8 °F | 72.7 °F | 4.2 in. |
| November | 39.5 °F | 59.2 °F | 4.39 in. |
| December | 32.1 °F | 48.4 °F | 4.75 in. |
| Annual | 50.1 °F | 69.5 °F | 51.14 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |