Orchard Hill, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 23 °C (high). Annual precipitation averages 1298.5 Millimeters. Orchard Hill 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 | 0.9 °C | 12.8 °C | 119.13 mm |
| February | 2.5 °C | 14.9 °C | 119.89 mm |
| March | 5.9 °C | 19.2 °C | 127 mm |
| April | 9.9 °C | 23.3 °C | 104.9 mm |
| May | 15 °C | 27.3 °C | 82.8 mm |
| June | 19.1 °C | 30.4 °C | 111.76 mm |
| July | 20.9 °C | 32 °C | 127.76 mm |
| August | 20.6 °C | 31.4 °C | 108.46 mm |
| September | 17.3 °C | 28.7 °C | 93.22 mm |
| October | 11.2 °C | 23.7 °C | 82.04 mm |
| November | 5.3 °C | 18.3 °C | 99.06 mm |
| December | 2.4 °C | 14 °C | 122.43 mm |
| Annual | 10.9 °C | 23 °C | 1298.45 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |