Knobel, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 20.8 °C (high). Annual precipitation averages 1266.7 Millimeters. Knobel is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.1 °C | 7.3 °C | 90.17 mm |
| February | -0.3 °C | 10.2 °C | 96.77 mm |
| March | 4.1 °C | 15.4 °C | 119.63 mm |
| April | 9.4 °C | 21.4 °C | 138.18 mm |
| May | 15.1 °C | 26.2 °C | 129.29 mm |
| June | 19.8 °C | 30.6 °C | 88.65 mm |
| July | 21.7 °C | 32.2 °C | 101.35 mm |
| August | 20.4 °C | 31.6 °C | 85.85 mm |
| September | 15.9 °C | 28.4 °C | 88.39 mm |
| October | 9.2 °C | 22.6 °C | 95.76 mm |
| November | 3.8 °C | 15 °C | 118.36 mm |
| December | -0.4 °C | 8.9 °C | 114.3 mm |
| Annual | 9.7 °C | 20.8 °C | 1266.7 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |