Union Point, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.7 °C (low) to 23.3 °C (high). Annual precipitation averages 1192.3 Millimeters. Union Point 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 | 0.7 °C | 12.8 °C | 102.87 mm |
| February | 2.1 °C | 14.8 °C | 111.76 mm |
| March | 5.4 °C | 19.1 °C | 118.11 mm |
| April | 9.7 °C | 23.7 °C | 88.65 mm |
| May | 14.6 °C | 27.6 °C | 81.79 mm |
| June | 19.1 °C | 31.2 °C | 108.46 mm |
| July | 21.1 °C | 32.8 °C | 106.68 mm |
| August | 20.5 °C | 32 °C | 107.44 mm |
| September | 17.2 °C | 29.2 °C | 99.82 mm |
| October | 10.8 °C | 24.2 °C | 69.09 mm |
| November | 4.8 °C | 18.5 °C | 84.33 mm |
| December | 1.9 °C | 13.9 °C | 113.28 mm |
| Annual | 10.7 °C | 23.3 °C | 1192.28 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 |