Crystal Lake, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.2 °C (low) to 28.6 °C (high). Annual precipitation averages 1380 Millimeters. Crystal Lake is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.7 °C | 22.3 °C | 72.64 mm |
| February | 11.3 °C | 24 °C | 58.93 mm |
| March | 13.3 °C | 26.3 °C | 74.93 mm |
| April | 16.3 °C | 28.8 °C | 74.68 mm |
| May | 19.4 °C | 31.4 °C | 93.22 mm |
| June | 22.2 °C | 32.7 °C | 216.66 mm |
| July | 23.2 °C | 33.1 °C | 209.8 mm |
| August | 23.3 °C | 33.1 °C | 205.74 mm |
| September | 22.6 °C | 32.2 °C | 185.93 mm |
| October | 19.2 °C | 29.6 °C | 72.64 mm |
| November | 14.4 °C | 26 °C | 45.47 mm |
| December | 11.5 °C | 23.5 °C | 69.34 mm |
| Annual | 17.2 °C | 28.6 °C | 1379.98 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |