Brinson, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.4 °F (low) to 78.9 °F (high). Annual precipitation averages 55.5 Inches. Brinson is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.2 °F | 62.0 °F | 4.96 in. |
| February | 42.4 °F | 65.9 °F | 4.8 in. |
| March | 48.0 °F | 72.8 °F | 5.36 in. |
| April | 54.9 °F | 79.3 °F | 4.38 in. |
| May | 63.6 °F | 86.7 °F | 3.11 in. |
| June | 70.7 °F | 90.9 °F | 5.57 in. |
| July | 72.4 °F | 92.2 °F | 5.79 in. |
| August | 72.3 °F | 91.7 °F | 5.61 in. |
| September | 68.0 °F | 88.2 °F | 4.81 in. |
| October | 57.4 °F | 81.1 °F | 2.99 in. |
| November | 46.6 °F | 71.5 °F | 3.57 in. |
| December | 41.6 °F | 64.3 °F | 4.56 in. |
| Annual | 56.4 °F | 78.9 °F | 55.51 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |