Shannon Hills, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.8 °C (low) to 22.7 °C (high). Annual precipitation averages 1383.6 Millimeters. Shannon Hills is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.4 °C | 10.5 °C | 100.08 mm |
| February | 1.3 °C | 13.1 °C | 108.97 mm |
| March | 5.4 °C | 17.9 °C | 132.08 mm |
| April | 10.2 °C | 23.1 °C | 144.53 mm |
| May | 15.7 °C | 27.2 °C | 141.48 mm |
| June | 20.2 °C | 31.4 °C | 96.27 mm |
| July | 22.1 °C | 33.4 °C | 100.08 mm |
| August | 21.3 °C | 33.3 °C | 86.11 mm |
| September | 17.3 °C | 29.9 °C | 91.44 mm |
| October | 10.6 °C | 23.9 °C | 118.36 mm |
| November | 4.8 °C | 17 °C | 128.78 mm |
| December | 0.9 °C | 12.1 °C | 135.38 mm |
| Annual | 10.8 °C | 22.7 °C | 1383.56 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |