Oliver, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.6 °C (low) to 25.2 °C (high). Annual precipitation averages 1227.6 Millimeters. Oliver is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.7 °C | 15.7 °C | 100.08 mm |
| February | 4.3 °C | 17.7 °C | 95.5 mm |
| March | 7.6 °C | 21.6 °C | 96.27 mm |
| April | 11.6 °C | 25.5 °C | 83.06 mm |
| May | 16.3 °C | 29.3 °C | 84.07 mm |
| June | 20.6 °C | 32.4 °C | 140.46 mm |
| July | 22.3 °C | 33.8 °C | 131.57 mm |
| August | 22.1 °C | 32.8 °C | 145.54 mm |
| September | 19.3 °C | 30.2 °C | 106.17 mm |
| October | 13.2 °C | 25.8 °C | 70.87 mm |
| November | 7 °C | 20.7 °C | 71.12 mm |
| December | 4.2 °C | 16.9 °C | 102.87 mm |
| Annual | 12.6 °C | 25.2 °C | 1227.58 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |