Ash Flat, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 21.1 °C (high). Annual precipitation averages 1277.4 Millimeters. Ash Flat is located in USDA Plant Hardiness Zone 7a. 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 | -3.4 °C | 8.2 °C | 88.9 mm |
| February | -1.7 °C | 10.9 °C | 90.68 mm |
| March | 2.7 °C | 15.9 °C | 119.89 mm |
| April | 7.7 °C | 21.7 °C | 137.92 mm |
| May | 13.1 °C | 25.8 °C | 135.38 mm |
| June | 17.7 °C | 30.3 °C | 91.19 mm |
| July | 19.9 °C | 32.6 °C | 98.55 mm |
| August | 19 °C | 32.4 °C | 97.79 mm |
| September | 14.6 °C | 28.3 °C | 97.28 mm |
| October | 7.9 °C | 22.4 °C | 99.06 mm |
| November | 2.4 °C | 15.3 °C | 117.6 mm |
| December | -1.7 °C | 9.6 °C | 103.12 mm |
| Annual | 8.2 °C | 21.1 °C | 1277.36 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |