Charlack, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 9.4 °C (low) to 19.2 °C (high). Annual precipitation averages 1098.6 Millimeters. Charlack 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 | -3.8 °C | 4.4 °C | 67.82 mm |
| February | -2.2 °C | 7.7 °C | 56.13 mm |
| March | 2.8 °C | 13.4 °C | 88.65 mm |
| April | 8.8 °C | 19.8 °C | 120.9 mm |
| May | 14.9 °C | 24.8 °C | 129.54 mm |
| June | 20 °C | 29.7 °C | 116.84 mm |
| July | 22.2 °C | 31.6 °C | 100.84 mm |
| August | 21.1 °C | 30.9 °C | 92.2 mm |
| September | 16.4 °C | 27.1 °C | 82.3 mm |
| October | 10 °C | 20.7 °C | 84.07 mm |
| November | 3.5 °C | 12.8 °C | 89.41 mm |
| December | -1.2 °C | 7.1 °C | 69.85 mm |
| Annual | 9.4 °C | 19.2 °C | 1098.55 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 |