La Monte, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 18.2 °C (high). Annual precipitation averages 1079.5 Millimeters. La Monte is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.6 °C | 3.7 °C | 41.66 mm |
| February | -4.3 °C | 6.4 °C | 50.29 mm |
| March | 0.8 °C | 12.5 °C | 70.87 mm |
| April | 6.4 °C | 18.2 °C | 114.05 mm |
| May | 12.6 °C | 23.5 °C | 135.38 mm |
| June | 17.9 °C | 28.5 °C | 131.06 mm |
| July | 20.1 °C | 30.8 °C | 116.33 mm |
| August | 18.8 °C | 30.2 °C | 100.58 mm |
| September | 14.1 °C | 26.2 °C | 108.71 mm |
| October | 7.4 °C | 19.9 °C | 88.39 mm |
| November | 1.2 °C | 12.3 °C | 70.1 mm |
| December | -3.9 °C | 5.9 °C | 52.07 mm |
| Annual | 7 °C | 18.2 °C | 1079.49 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°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 |