Gilbert, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11 °C (low) to 23.4 °C (high). Annual precipitation averages 1224.8 Millimeters. Gilbert is located in USDA Plant Hardiness Zone 8b. 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 | 1.1 °C | 13.1 °C | 103.12 mm |
| February | 2.3 °C | 15.2 °C | 93.47 mm |
| March | 5.7 °C | 19.3 °C | 107.19 mm |
| April | 10.1 °C | 23.8 °C | 83.06 mm |
| May | 15.1 °C | 27.8 °C | 88.14 mm |
| June | 19.6 °C | 31.3 °C | 127 mm |
| July | 21.2 °C | 32.8 °C | 121.41 mm |
| August | 20.7 °C | 31.9 °C | 122.17 mm |
| September | 17.6 °C | 29.1 °C | 100.08 mm |
| October | 11.1 °C | 24 °C | 86.61 mm |
| November | 5.3 °C | 18.5 °C | 88.65 mm |
| December | 2.2 °C | 14.3 °C | 103.89 mm |
| Annual | 11 °C | 23.4 °C | 1224.79 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |