Thomson, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.8 °F (low) to 74.5 °F (high). Annual precipitation averages 46.8 Inches. Thomson 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 | 34.1 °F | 56.1 °F | 4.27 in. |
| February | 36.2 °F | 59.4 °F | 3.98 in. |
| March | 42.1 °F | 67.1 °F | 4.69 in. |
| April | 50.1 °F | 75.1 °F | 3.17 in. |
| May | 59.0 °F | 82.1 °F | 3.13 in. |
| June | 67.0 °F | 88.2 °F | 4.53 in. |
| July | 70.3 °F | 91.2 °F | 4.12 in. |
| August | 69.3 °F | 90.2 °F | 4.5 in. |
| September | 63.7 °F | 84.8 °F | 4.02 in. |
| October | 51.9 °F | 76.0 °F | 2.95 in. |
| November | 41.0 °F | 66.0 °F | 3.25 in. |
| December | 36.5 °F | 58.2 °F | 4.18 in. |
| Annual | 51.8 °F | 74.5 °F | 46.79 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |