Lake Kathryn, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.6 °F (low) to 82.6 °F (high). Annual precipitation averages 55.9 Inches. Lake Kathryn is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.9 °F | 70.1 °F | 3.05 in. |
| February | 47.6 °F | 73.0 °F | 2.41 in. |
| March | 51.4 °F | 77.7 °F | 3.1 in. |
| April | 56.9 °F | 83.4 °F | 2.94 in. |
| May | 63.4 °F | 88.4 °F | 3.93 in. |
| June | 70.1 °F | 91.2 °F | 8.27 in. |
| July | 72.0 °F | 92.4 °F | 7.77 in. |
| August | 72.4 °F | 92.2 °F | 8.71 in. |
| September | 70.2 °F | 89.4 °F | 7.24 in. |
| October | 63.2 °F | 84.3 °F | 3.78 in. |
| November | 54.2 °F | 77.1 °F | 2.05 in. |
| December | 48.6 °F | 72.2 °F | 2.6 in. |
| Annual | 59.6 °F | 82.6 °F | 55.85 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |