Lakeside, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.5 °C (low) to 19.1 °C (high). Annual precipitation averages 1104.1 Millimeters. Lakeside is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.2 °C | 5.3 °C | 54.1 mm |
| February | -3.3 °C | 8 °C | 54.36 mm |
| March | 1.3 °C | 13.7 °C | 74.93 mm |
| April | 6.9 °C | 19.8 °C | 128.27 mm |
| May | 12.6 °C | 24.1 °C | 141.99 mm |
| June | 17.5 °C | 28.6 °C | 109.47 mm |
| July | 19.9 °C | 31 °C | 104.39 mm |
| August | 18.9 °C | 30.7 °C | 104.65 mm |
| September | 14.3 °C | 26.8 °C | 108.2 mm |
| October | 7.9 °C | 20.8 °C | 84.07 mm |
| November | 2.1 °C | 13.4 °C | 79.5 mm |
| December | -2.9 °C | 7.5 °C | 60.2 mm |
| Annual | 7.5 °C | 19.1 °C | 1104.13 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |