Umatilla, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.6 °C (low) to 27.9 °C (high). Annual precipitation averages 1370.6 Millimeters. Umatilla is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.3 °C | 20.9 °C | 75.95 mm |
| February | 8.9 °C | 22.5 °C | 61.98 mm |
| March | 11.1 °C | 25.2 °C | 86.36 mm |
| April | 14.5 °C | 28.3 °C | 70.1 mm |
| May | 18.1 °C | 31 °C | 92.2 mm |
| June | 21.6 °C | 32.6 °C | 202.69 mm |
| July | 22.6 °C | 33.2 °C | 188.72 mm |
| August | 22.7 °C | 33.2 °C | 212.34 mm |
| September | 21.6 °C | 31.7 °C | 173.23 mm |
| October | 17.6 °C | 28.8 °C | 86.87 mm |
| November | 12.3 °C | 24.9 °C | 53.59 mm |
| December | 9.3 °C | 22.1 °C | 66.55 mm |
| Annual | 15.6 °C | 27.9 °C | 1370.58 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |