Glenwood, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.9 °F (low) to 77.6 °F (high). Annual precipitation averages 45.9 Inches. Glenwood is located in USDA Plant Hardiness Zone 8b. 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 | 36.4 °F | 60.5 °F | 4.31 in. |
| February | 39.3 °F | 64.1 °F | 3.97 in. |
| March | 44.8 °F | 70.7 °F | 4.27 in. |
| April | 52.0 °F | 78.0 °F | 3.18 in. |
| May | 60.6 °F | 85.4 °F | 2.77 in. |
| June | 68.5 °F | 90.4 °F | 4.75 in. |
| July | 71.5 °F | 92.6 °F | 4.41 in. |
| August | 70.9 °F | 91.6 °F | 5.51 in. |
| September | 65.6 °F | 87.2 °F | 3.36 in. |
| October | 54.3 °F | 79.1 °F | 2.53 in. |
| November | 43.9 °F | 69.6 °F | 2.79 in. |
| December | 38.6 °F | 62.5 °F | 4.02 in. |
| Annual | 53.9 °F | 77.6 °F | 45.87 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |