Riceboro, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.1 °C (low) to 25.6 °C (high). Annual precipitation averages 1305.8 Millimeters. Riceboro is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.4 °C | 16.8 °C | 92.96 mm |
| February | 4.9 °C | 18.6 °C | 86.87 mm |
| March | 8.3 °C | 22 °C | 93.47 mm |
| April | 11.9 °C | 25.8 °C | 80.52 mm |
| May | 16.6 °C | 29.4 °C | 84.84 mm |
| June | 20.7 °C | 32.1 °C | 158.24 mm |
| July | 22.4 °C | 33.6 °C | 155.96 mm |
| August | 22.2 °C | 32.8 °C | 191.01 mm |
| September | 19.8 °C | 30.3 °C | 120.65 mm |
| October | 14.1 °C | 26.3 °C | 104.9 mm |
| November | 7.9 °C | 21.7 °C | 55.63 mm |
| December | 5.1 °C | 18.1 °C | 80.77 mm |
| Annual | 13.1 °C | 25.6 °C | 1305.82 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |