Lake Lafayette, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 18.1 °C (high). Annual precipitation averages 1075.7 Millimeters. 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 | -7.3 °C | 3.3 °C | 36.07 mm |
| February | -5.1 °C | 6.2 °C | 45.21 mm |
| March | 0.3 °C | 12.3 °C | 70.87 mm |
| April | 6 °C | 18.2 °C | 109.73 mm |
| May | 12.1 °C | 23.5 °C | 138.68 mm |
| June | 17.4 °C | 28.5 °C | 136.14 mm |
| July | 19.6 °C | 31 °C | 127.25 mm |
| August | 18.4 °C | 30.3 °C | 108.2 mm |
| September | 13.5 °C | 26.2 °C | 106.93 mm |
| October | 6.9 °C | 19.8 °C | 85.85 mm |
| November | 0.6 °C | 12 °C | 63.5 mm |
| December | -4.8 °C | 5.6 °C | 47.24 mm |
| Annual | 6.5 °C | 18.1 °C | 1075.67 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |