Mary Esther, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60 °F (low) to 76.1 °F (high). Annual precipitation averages 66.7 Inches. Mary Esther 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 Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.7 °F | 60.4 °F | 6.23 in. |
| February | 45.9 °F | 63.2 °F | 5.32 in. |
| March | 52.3 °F | 68.8 °F | 4.94 in. |
| April | 59.0 °F | 74.0 °F | 6.25 in. |
| May | 66.8 °F | 81.8 °F | 3.35 in. |
| June | 73.7 °F | 87.2 °F | 5.82 in. |
| July | 75.4 °F | 89.2 °F | 6.87 in. |
| August | 75.1 °F | 88.5 °F | 7.86 in. |
| September | 71.4 °F | 86.8 °F | 5.67 in. |
| October | 61.6 °F | 79.7 °F | 4.69 in. |
| November | 50.7 °F | 70.2 °F | 4.35 in. |
| December | 45.5 °F | 63.1 °F | 5.34 in. |
| Annual | 60 °F | 76.1 °F | 66.69 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |