Altheimer, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.6 °F (low) to 72.8 °F (high). Annual precipitation averages 52.7 Inches. Altheimer is located in USDA Plant Hardiness Zone 8b. 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 | 32.9 °F | 50.8 °F | 4.13 in. |
| February | 36.0 °F | 55.6 °F | 4.4 in. |
| March | 43.3 °F | 64.1 °F | 5.2 in. |
| April | 51.8 °F | 73.5 °F | 5.76 in. |
| May | 61.6 °F | 81.2 °F | 4.97 in. |
| June | 69.4 °F | 88.7 °F | 3.43 in. |
| July | 72.4 °F | 91.4 °F | 3.56 in. |
| August | 70.9 °F | 90.9 °F | 3.27 in. |
| September | 63.8 °F | 85.6 °F | 3.4 in. |
| October | 52.0 °F | 75.3 °F | 4.42 in. |
| November | 41.9 °F | 62.7 °F | 4.47 in. |
| December | 35.5 °F | 53.6 °F | 5.65 in. |
| Annual | 52.6 °F | 72.8 °F | 52.66 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |