Alva, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 62.9 °F (low) to 84.5 °F (high). Annual precipitation averages 56.2 Inches. Alva is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 50.6 °F | 74.7 °F | 2.07 in. |
| February | 53.0 °F | 77.5 °F | 1.97 in. |
| March | 55.5 °F | 80.7 °F | 2.43 in. |
| April | 60.3 °F | 84.9 °F | 2.37 in. |
| May | 65.6 °F | 88.8 °F | 4.37 in. |
| June | 71.0 °F | 90.8 °F | 9.99 in. |
| July | 72.7 °F | 91.4 °F | 8.94 in. |
| August | 73.2 °F | 91.7 °F | 9.61 in. |
| September | 72.3 °F | 90.1 °F | 7.7 in. |
| October | 67.2 °F | 86.3 °F | 3.0 in. |
| November | 58.9 °F | 80.6 °F | 1.82 in. |
| December | 54.2 °F | 76.6 °F | 1.88 in. |
| Annual | 62.9 °F | 84.5 °F | 56.15 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |