Vienna, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 25 °C (high). Annual precipitation averages 1229.1 Millimeters. Vienna 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 | 2.8 °C | 15.1 °C | 117.35 mm |
| February | 4.2 °C | 17.1 °C | 105.92 mm |
| March | 7.4 °C | 21.1 °C | 121.16 mm |
| April | 11.7 °C | 25.3 °C | 102.36 mm |
| May | 16.7 °C | 29.4 °C | 74.17 mm |
| June | 20.8 °C | 32.2 °C | 118.87 mm |
| July | 22.2 °C | 33.3 °C | 119.13 mm |
| August | 21.8 °C | 32.7 °C | 106.68 mm |
| September | 18.9 °C | 30.5 °C | 102.36 mm |
| October | 12.6 °C | 26 °C | 69.09 mm |
| November | 6.7 °C | 20.5 °C | 82.04 mm |
| December | 4 °C | 16.3 °C | 109.98 mm |
| Annual | 12.5 °C | 25 °C | 1229.11 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°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 |