Calion, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 23.9 °C (high). Annual precipitation averages 1363.2 Millimeters. Calion 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.1 °C | 12.6 °C | 116.33 mm |
| February | 1.7 °C | 14.9 °C | 115.82 mm |
| March | 5.9 °C | 19.5 °C | 140.72 mm |
| April | 10.2 °C | 24.1 °C | 143.26 mm |
| May | 15.5 °C | 27.9 °C | 122.68 mm |
| June | 19.6 °C | 32 °C | 103.89 mm |
| July | 21.5 °C | 33.7 °C | 92.96 mm |
| August | 20.7 °C | 33.8 °C | 91.19 mm |
| September | 16.8 °C | 30.7 °C | 88.65 mm |
| October | 9.8 °C | 24.9 °C | 111.76 mm |
| November | 4.3 °C | 18.6 °C | 98.04 mm |
| December | 1.2 °C | 13.8 °C | 137.92 mm |
| Annual | 10.6 °C | 23.9 °C | 1363.22 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 8b : -9.4°C to -6.7°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 |