Yonah, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 20.5 °C (high). Annual precipitation averages 1709.4 Millimeters. Yonah is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °C | 10.1 °C | 160.27 mm |
| February | -0.1 °C | 12.3 °C | 143.76 mm |
| March | 2.9 °C | 16.3 °C | 150.62 mm |
| April | 7 °C | 21.2 °C | 131.32 mm |
| May | 11.8 °C | 24.7 °C | 125.48 mm |
| June | 16.2 °C | 28.1 °C | 146.3 mm |
| July | 18.2 °C | 29.6 °C | 137.16 mm |
| August | 17.8 °C | 29.1 °C | 158.5 mm |
| September | 14.4 °C | 26.3 °C | 121.41 mm |
| October | 8.2 °C | 21.3 °C | 130.3 mm |
| November | 2.5 °C | 15.9 °C | 141.22 mm |
| December | -0.1 °C | 11.6 °C | 163.07 mm |
| Annual | 8.1 °C | 20.5 °C | 1709.41 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |