Union Park, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.3 °C (low) to 28 °C (high). Annual precipitation averages 1409.7 Millimeters. Union Park is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.6 °C | 21.5 °C | 72.64 mm |
| February | 11.1 °C | 23.1 °C | 60.2 mm |
| March | 13.3 °C | 25.4 °C | 90.17 mm |
| April | 16.2 °C | 28.2 °C | 72.9 mm |
| May | 19.4 °C | 30.8 °C | 101.35 mm |
| June | 22.4 °C | 32.3 °C | 211.84 mm |
| July | 23.3 °C | 33.1 °C | 194.82 mm |
| August | 23.6 °C | 32.9 °C | 211.07 mm |
| September | 22.8 °C | 31.7 °C | 175.77 mm |
| October | 19.3 °C | 29.1 °C | 97.54 mm |
| November | 14.7 °C | 25.4 °C | 53.34 mm |
| December | 11.4 °C | 22.7 °C | 68.07 mm |
| Annual | 17.3 °C | 28 °C | 1409.71 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 |