Cairo, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.5 °C (low) to 25.8 °C (high). Annual precipitation averages 1347 Millimeters. Cairo 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 | 4.1 °C | 16.7 °C | 114.55 mm |
| February | 5.7 °C | 18.8 °C | 110.74 mm |
| March | 8.9 °C | 22.5 °C | 127.51 mm |
| April | 12.6 °C | 26 °C | 98.81 mm |
| May | 17.1 °C | 29.9 °C | 70.87 mm |
| June | 21.1 °C | 32.2 °C | 150.62 mm |
| July | 22.2 °C | 33.1 °C | 149.1 mm |
| August | 22.2 °C | 32.6 °C | 147.57 mm |
| September | 19.9 °C | 30.7 °C | 113.54 mm |
| October | 14.2 °C | 26.9 °C | 77.72 mm |
| November | 8.3 °C | 21.8 °C | 84.07 mm |
| December | 5.6 °C | 17.9 °C | 101.85 mm |
| Annual | 13.5 °C | 25.8 °C | 1346.95 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |