Monroe, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51 °F (low) to 72.3 °F (high). Annual precipitation averages 50.9 Inches. Monroe 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 | 33.1 °F | 53.3 °F | 4.69 in. |
| February | 35.5 °F | 56.9 °F | 4.64 in. |
| March | 41.4 °F | 65.0 °F | 5.14 in. |
| April | 49.2 °F | 72.9 °F | 3.87 in. |
| May | 58.2 °F | 80.0 °F | 3.11 in. |
| June | 66.2 °F | 86.3 °F | 4.47 in. |
| July | 69.4 °F | 89.3 °F | 3.83 in. |
| August | 68.7 °F | 88.1 °F | 4.65 in. |
| September | 62.8 °F | 82.9 °F | 3.93 in. |
| October | 51.4 °F | 73.6 °F | 3.48 in. |
| November | 40.4 °F | 63.7 °F | 4.56 in. |
| December | 35.3 °F | 55.4 °F | 4.56 in. |
| Annual | 51 °F | 72.3 °F | 50.93 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 |