Kirksville, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.3 °C (low) to 16.5 °C (high). Annual precipitation averages 1043.2 Millimeters. Kirksville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | 0.9 °C | 35.31 mm |
| February | -7.1 °C | 3.7 °C | 44.7 mm |
| March | -1.3 °C | 10.4 °C | 63.25 mm |
| April | 4.9 °C | 17 °C | 100.58 mm |
| May | 11.1 °C | 22.3 °C | 142.75 mm |
| June | 16.4 °C | 27.4 °C | 139.19 mm |
| July | 18.6 °C | 29.8 °C | 117.35 mm |
| August | 17.4 °C | 29.2 °C | 101.85 mm |
| September | 12.6 °C | 25.2 °C | 111.76 mm |
| October | 6.1 °C | 18.3 °C | 84.33 mm |
| November | -0.5 °C | 10.6 °C | 59.94 mm |
| December | -5.8 °C | 3.5 °C | 42.16 mm |
| Annual | 5.3 °C | 16.5 °C | 1043.17 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |