Lake Lafayette, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.7 °F (low) to 64.5 °F (high). Annual precipitation averages 42.4 Inches. Lake Lafayette 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 | 18.9 °F | 37.9 °F | 1.42 in. |
| February | 22.9 °F | 43.2 °F | 1.78 in. |
| March | 32.5 °F | 54.2 °F | 2.79 in. |
| April | 42.8 °F | 64.8 °F | 4.32 in. |
| May | 53.8 °F | 74.3 °F | 5.46 in. |
| June | 63.3 °F | 83.3 °F | 5.36 in. |
| July | 67.3 °F | 87.8 °F | 5.01 in. |
| August | 65.2 °F | 86.5 °F | 4.26 in. |
| September | 56.3 °F | 79.1 °F | 4.21 in. |
| October | 44.4 °F | 67.7 °F | 3.38 in. |
| November | 33.1 °F | 53.6 °F | 2.5 in. |
| December | 23.4 °F | 42.1 °F | 1.86 in. |
| Annual | 43.7 °F | 64.5 °F | 42.35 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |