Georgetown, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.2 °C (low) to 24.8 °C (high). Annual precipitation averages 1525.5 Millimeters. Georgetown is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.4 °C | 14.3 °C | 148.08 mm |
| February | 4 °C | 16.9 °C | 152.15 mm |
| March | 7.8 °C | 21.1 °C | 146.05 mm |
| April | 11.7 °C | 24.9 °C | 138.94 mm |
| May | 16.5 °C | 28.8 °C | 110.74 mm |
| June | 20.4 °C | 32.2 °C | 122.68 mm |
| July | 21.7 °C | 33.3 °C | 134.62 mm |
| August | 21.4 °C | 33.4 °C | 132.59 mm |
| September | 18.4 °C | 31 °C | 94.23 mm |
| October | 11.9 °C | 26.1 °C | 87.63 mm |
| November | 6.4 °C | 19.9 °C | 113.54 mm |
| December | 3.6 °C | 15.6 °C | 144.27 mm |
| Annual | 12.2 °C | 24.8 °C | 1525.52 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 |