Sumatra, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.4 °C (low) to 26.5 °C (high). Annual precipitation averages 1556.5 Millimeters. Sumatra is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.1 °C | 18.1 °C | 124.97 mm |
| February | 5.9 °C | 20.1 °C | 115.32 mm |
| March | 8.9 °C | 23.3 °C | 136.14 mm |
| April | 12.2 °C | 26.7 °C | 108.97 mm |
| May | 16.4 °C | 30.5 °C | 88.9 mm |
| June | 20.7 °C | 32.4 °C | 168.15 mm |
| July | 21.8 °C | 33.2 °C | 195.07 mm |
| August | 22.1 °C | 32.8 °C | 191.77 mm |
| September | 20.1 °C | 31.3 °C | 152.15 mm |
| October | 14.4 °C | 27.8 °C | 87.38 mm |
| November | 8.5 °C | 22.9 °C | 85.34 mm |
| December | 5.6 °C | 19.3 °C | 102.36 mm |
| Annual | 13.4 °C | 26.5 °C | 1556.52 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |