Griffin, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.5 °F (low) to 72.9 °F (high). Annual precipitation averages 51.6 Inches. Griffin 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 | 34.6 °F | 54.4 °F | 4.77 in. |
| February | 37.5 °F | 58.2 °F | 4.8 in. |
| March | 43.6 °F | 65.9 °F | 4.95 in. |
| April | 50.9 °F | 73.4 °F | 4.18 in. |
| May | 60.0 °F | 80.7 °F | 3.32 in. |
| June | 67.2 °F | 86.3 °F | 4.44 in. |
| July | 70.3 °F | 89.2 °F | 5.13 in. |
| August | 69.5 °F | 88.2 °F | 4.26 in. |
| September | 63.9 °F | 83.2 °F | 3.6 in. |
| October | 53.0 °F | 74.1 °F | 3.28 in. |
| November | 42.4 °F | 64.4 °F | 3.95 in. |
| December | 37.1 °F | 56.6 °F | 4.87 in. |
| Annual | 52.5 °F | 72.9 °F | 51.55 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |