Courtland, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.5 °C (low) to 22.8 °C (high). Annual precipitation averages 1441.4 Millimeters. Courtland 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.3 °C | 10.8 °C | 122.17 mm |
| February | 1.2 °C | 13.3 °C | 138.68 mm |
| March | 5.3 °C | 18.2 °C | 135.64 mm |
| April | 9.9 °C | 23.1 °C | 148.84 mm |
| May | 15.4 °C | 27.3 °C | 130.3 mm |
| June | 19.7 °C | 31.2 °C | 124.97 mm |
| July | 21.6 °C | 32.6 °C | 107.7 mm |
| August | 20.7 °C | 32.7 °C | 80.26 mm |
| September | 16.8 °C | 30.1 °C | 84.07 mm |
| October | 10.2 °C | 24.4 °C | 103.63 mm |
| November | 4.3 °C | 17.6 °C | 113.54 mm |
| December | 1.1 °C | 12.3 °C | 151.64 mm |
| Annual | 10.5 °C | 22.8 °C | 1441.44 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |