Richton, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.9 °C (low) to 25.4 °C (high). Annual precipitation averages 1538.2 Millimeters. Richton 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 | 2.3 °C | 15.7 °C | 156.97 mm |
| February | 4.1 °C | 17.9 °C | 141.48 mm |
| March | 7.4 °C | 21.8 °C | 146.81 mm |
| April | 11.1 °C | 25.6 °C | 125.22 mm |
| May | 15.8 °C | 29.4 °C | 109.22 mm |
| June | 19.9 °C | 32.4 °C | 133.35 mm |
| July | 21.4 °C | 33.3 °C | 157.73 mm |
| August | 21.2 °C | 33.3 °C | 127.25 mm |
| September | 18.4 °C | 31.4 °C | 104.65 mm |
| October | 11.7 °C | 26.7 °C | 88.39 mm |
| November | 5.9 °C | 20.8 °C | 102.11 mm |
| December | 3.3 °C | 16.7 °C | 145.03 mm |
| Annual | 11.9 °C | 25.4 °C | 1538.21 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |