Leeton, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.7 °C (low) to 18.1 °C (high). Annual precipitation averages 1100.8 Millimeters. Leeton 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 | -6.9 °C | 3.8 °C | 42.42 mm |
| February | -4.7 °C | 6.7 °C | 49.78 mm |
| March | 0.5 °C | 12.6 °C | 71.88 mm |
| April | 6.1 °C | 18.2 °C | 116.33 mm |
| May | 12.2 °C | 23.3 °C | 139.19 mm |
| June | 17.4 °C | 28.2 °C | 134.37 mm |
| July | 19.7 °C | 30.7 °C | 116.59 mm |
| August | 18.5 °C | 30.1 °C | 103.63 mm |
| September | 13.8 °C | 25.9 °C | 110.74 mm |
| October | 7.1 °C | 19.7 °C | 89.92 mm |
| November | 0.8 °C | 12.3 °C | 72.9 mm |
| December | -4.3 °C | 6.1 °C | 53.09 mm |
| Annual | 6.7 °C | 18.1 °C | 1100.84 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |