Ashley, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.4 °C (low) to 17.8 °C (high). Annual precipitation averages 1011.7 Millimeters. Ashley 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 | -7.1 °C | 2.7 °C | 54.61 mm |
| February | -5.2 °C | 5.6 °C | 52.58 mm |
| March | 0 °C | 11.7 °C | 72.14 mm |
| April | 6.1 °C | 18.4 °C | 107.19 mm |
| May | 11.9 °C | 23.6 °C | 118.87 mm |
| June | 17.1 °C | 28.4 °C | 115.57 mm |
| July | 19.2 °C | 30.6 °C | 109.22 mm |
| August | 18.1 °C | 29.9 °C | 86.61 mm |
| September | 13.4 °C | 26.2 °C | 92.96 mm |
| October | 6.9 °C | 19.6 °C | 74.68 mm |
| November | 0.9 °C | 11.9 °C | 71.37 mm |
| December | -4.2 °C | 5.1 °C | 55.88 mm |
| Annual | 6.4 °C | 17.8 °C | 1011.68 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 |