Fort Walton Beach, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.7 °C (low) to 24.5 °C (high). Annual precipitation averages 1672.3 Millimeters. Fort Walton Beach is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.2 °C | 15.8 °C | 157.48 mm |
| February | 7.9 °C | 17.3 °C | 134.87 mm |
| March | 11.4 °C | 20.5 °C | 126.24 mm |
| April | 15.1 °C | 23.4 °C | 158.24 mm |
| May | 19.4 °C | 27.7 °C | 84.58 mm |
| June | 23.3 °C | 30.7 °C | 142.24 mm |
| July | 24.3 °C | 31.7 °C | 167.89 mm |
| August | 24.1 °C | 31.4 °C | 191.26 mm |
| September | 22 °C | 30.4 °C | 146.56 mm |
| October | 16.6 °C | 26.5 °C | 118.87 mm |
| November | 10.6 °C | 21.2 °C | 110.49 mm |
| December | 7.6 °C | 17.4 °C | 133.6 mm |
| Annual | 15.7 °C | 24.5 °C | 1672.32 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |