Alexander, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 22.9 °C (high). Annual precipitation averages 1397 Millimeters. Alexander is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.7 °C | 10.7 °C | 99.31 mm |
| February | 1.1 °C | 13.3 °C | 109.73 mm |
| March | 5.2 °C | 18.1 °C | 133.6 mm |
| April | 10 °C | 23.2 °C | 145.8 mm |
| May | 15.6 °C | 27.3 °C | 143.76 mm |
| June | 20.1 °C | 31.6 °C | 98.3 mm |
| July | 21.9 °C | 33.4 °C | 102.87 mm |
| August | 21.2 °C | 33.4 °C | 86.61 mm |
| September | 17.1 °C | 29.9 °C | 92.46 mm |
| October | 10.3 °C | 24.1 °C | 118.87 mm |
| November | 4.6 °C | 17.1 °C | 131.06 mm |
| December | 0.8 °C | 12.2 °C | 134.62 mm |
| Annual | 10.6 °C | 22.9 °C | 1396.99 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 |