Lathrop, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.9 °C (low) to 17.5 °C (high). Annual precipitation averages 1032.8 Millimeters. Lathrop 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 | -8.3 °C | 2.2 °C | 29.97 mm |
| February | -6.1 °C | 5.1 °C | 43.18 mm |
| March | -0.3 °C | 12.1 °C | 58.93 mm |
| April | 5 °C | 17.7 °C | 101.35 mm |
| May | 11.6 °C | 22.8 °C | 139.7 mm |
| June | 16.8 °C | 28.1 °C | 139.7 mm |
| July | 19.3 °C | 30.8 °C | 124.46 mm |
| August | 18.2 °C | 29.8 °C | 105.92 mm |
| September | 13.1 °C | 25.8 °C | 108.71 mm |
| October | 6.4 °C | 19.2 °C | 83.31 mm |
| November | 0.1 °C | 11.4 °C | 53.59 mm |
| December | -5.4 °C | 4.6 °C | 43.94 mm |
| Annual | 5.9 °C | 17.5 °C | 1032.76 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 |