Junction City, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.5 °C (low) to 23.9 °C (high). Annual precipitation averages 1287.3 Millimeters. Junction City 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 | 1.7 °C | 14 °C | 116.59 mm |
| February | 3.3 °C | 16.3 °C | 115.32 mm |
| March | 6.7 °C | 20.4 °C | 127 mm |
| April | 10.3 °C | 24.1 °C | 99.57 mm |
| May | 15.3 °C | 28.2 °C | 81.03 mm |
| June | 19.5 °C | 31.1 °C | 117.09 mm |
| July | 21.2 °C | 32.3 °C | 126.49 mm |
| August | 20.9 °C | 31.8 °C | 110.24 mm |
| September | 17.8 °C | 29.3 °C | 99.57 mm |
| October | 11.6 °C | 24.6 °C | 72.39 mm |
| November | 5.9 °C | 19.4 °C | 93.73 mm |
| December | 3.2 °C | 15.1 °C | 128.27 mm |
| Annual | 11.5 °C | 23.9 °C | 1287.29 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |