Ethel, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 17.3 °C (high). Annual precipitation averages 1056.9 Millimeters. Ethel 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 | -8.3 °C | 1.8 °C | 36.32 mm |
| February | -6.3 °C | 4.7 °C | 44.7 mm |
| March | -0.7 °C | 11.3 °C | 64.52 mm |
| April | 5.3 °C | 17.8 °C | 101.09 mm |
| May | 11.4 °C | 23.1 °C | 150.37 mm |
| June | 16.8 °C | 28.1 °C | 141.99 mm |
| July | 18.9 °C | 30.5 °C | 123.19 mm |
| August | 17.6 °C | 29.9 °C | 103.12 mm |
| September | 12.7 °C | 25.9 °C | 107.19 mm |
| October | 6.4 °C | 19.1 °C | 78.99 mm |
| November | 0.1 °C | 11.4 °C | 60.96 mm |
| December | -5.4 °C | 4.3 °C | 44.45 mm |
| Annual | 5.7 °C | 17.3 °C | 1056.89 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |