Rison, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52 °F (low) to 73.6 °F (high). Annual precipitation averages 55.7 Inches. Rison 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.5 °F | 52.6 °F | 4.39 in. |
| February | 35.5 °F | 57.1 °F | 4.63 in. |
| March | 42.8 °F | 65.5 °F | 5.5 in. |
| April | 51.0 °F | 74.5 °F | 5.62 in. |
| May | 60.5 °F | 81.4 °F | 5.12 in. |
| June | 68.3 °F | 88.7 °F | 3.71 in. |
| July | 71.4 °F | 91.7 °F | 4.15 in. |
| August | 70.3 °F | 91.6 °F | 3.81 in. |
| September | 63.5 °F | 86.0 °F | 3.68 in. |
| October | 51.4 °F | 75.7 °F | 5.03 in. |
| November | 41.4 °F | 63.8 °F | 4.45 in. |
| December | 35.1 °F | 55.0 °F | 5.63 in. |
| Annual | 52 °F | 73.6 °F | 55.72 in. |
| 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |