Big Lake, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.2 °C (low) to 17.7 °C (high). Annual precipitation averages 902.5 Millimeters. Big Lake 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 | -9.1 °C | 1.9 °C | 20.32 mm |
| February | -6.9 °C | 4.9 °C | 29.97 mm |
| March | -1.3 °C | 12 °C | 53.09 mm |
| April | 4.9 °C | 18.2 °C | 90.93 mm |
| May | 11.4 °C | 23.9 °C | 128.02 mm |
| June | 17.1 °C | 28.7 °C | 122.43 mm |
| July | 18.8 °C | 30.7 °C | 123.44 mm |
| August | 17.4 °C | 29.9 °C | 98.55 mm |
| September | 12.6 °C | 26.4 °C | 81.53 mm |
| October | 5.6 °C | 19.7 °C | 73.41 mm |
| November | -1.2 °C | 11.6 °C | 47.75 mm |
| December | -7 °C | 4 °C | 33.02 mm |
| Annual | 5.2 °C | 17.7 °C | 902.46 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |