Lathrop, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.6 °F (low) to 63.4 °F (high). Annual precipitation averages 40.7 Inches. 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 | 17.1 °F | 36.0 °F | 1.18 in. |
| February | 21.1 °F | 41.2 °F | 1.7 in. |
| March | 31.5 °F | 53.7 °F | 2.32 in. |
| April | 41.0 °F | 63.8 °F | 3.99 in. |
| May | 52.8 °F | 73.1 °F | 5.5 in. |
| June | 62.3 °F | 82.5 °F | 5.5 in. |
| July | 66.7 °F | 87.4 °F | 4.9 in. |
| August | 64.8 °F | 85.7 °F | 4.17 in. |
| September | 55.6 °F | 78.5 °F | 4.28 in. |
| October | 43.6 °F | 66.5 °F | 3.28 in. |
| November | 32.1 °F | 52.6 °F | 2.11 in. |
| December | 22.3 °F | 40.2 °F | 1.73 in. |
| Annual | 42.6 °F | 63.4 °F | 40.66 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |