Georgetown, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.4 °F (low) to 77.6 °F (high). Annual precipitation averages 59.8 Inches. 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 | 36.9 °F | 59.0 °F | 5.91 in. |
| February | 39.8 °F | 63.0 °F | 5.28 in. |
| March | 46.3 °F | 71.0 °F | 5.57 in. |
| April | 53.5 °F | 77.9 °F | 5.78 in. |
| May | 62.2 °F | 84.9 °F | 4.88 in. |
| June | 69.2 °F | 90.2 °F | 4.79 in. |
| July | 71.9 °F | 93.2 °F | 4.56 in. |
| August | 71.0 °F | 94.0 °F | 3.79 in. |
| September | 65.3 °F | 88.9 °F | 3.9 in. |
| October | 54.4 °F | 80.1 °F | 4.45 in. |
| November | 44.0 °F | 68.7 °F | 5.16 in. |
| December | 38.6 °F | 60.7 °F | 5.77 in. |
| Annual | 54.4 °F | 77.6 °F | 59.84 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |