Chain-O-Lakes, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 20.7 °C (high). Annual precipitation averages 1165.1 Millimeters. Chain-O-Lakes 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 Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.4 °C | 7.9 °C | 68.33 mm |
| February | -2.7 °C | 10.2 °C | 62.23 mm |
| March | 1.7 °C | 15.2 °C | 102.62 mm |
| April | 6.9 °C | 20.6 °C | 123.95 mm |
| May | 12.7 °C | 25.4 °C | 135.38 mm |
| June | 17.7 °C | 29.8 °C | 103.38 mm |
| July | 19.6 °C | 32.6 °C | 100.84 mm |
| August | 18.8 °C | 32.1 °C | 78.23 mm |
| September | 14.1 °C | 27.9 °C | 119.63 mm |
| October | 6.9 °C | 21.9 °C | 94.74 mm |
| November | 1.9 °C | 15.3 °C | 97.54 mm |
| December | -2.4 °C | 9.7 °C | 78.23 mm |
| Annual | 7.6 °C | 20.7 °C | 1165.1 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 | Cfa - Humid Subtropical Climate |