Watertown, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14 °C (low) to 26.3 °C (high). Annual precipitation averages 1379.2 Millimeters. Watertown is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.3 °C | 18.3 °C | 106.17 mm |
| February | 6.9 °C | 20.3 °C | 82.04 mm |
| March | 9.5 °C | 23.6 °C | 106.68 mm |
| April | 12.9 °C | 26.4 °C | 84.84 mm |
| May | 17 °C | 30.2 °C | 89.15 mm |
| June | 20.7 °C | 31.9 °C | 207.01 mm |
| July | 21.8 °C | 32.7 °C | 176.02 mm |
| August | 21.9 °C | 32.3 °C | 184.4 mm |
| September | 20.3 °C | 30.7 °C | 153.16 mm |
| October | 15.2 °C | 27.1 °C | 69.34 mm |
| November | 9.6 °C | 22.9 °C | 46.48 mm |
| December | 6.8 °C | 19.6 °C | 73.91 mm |
| Annual | 14 °C | 26.3 °C | 1379.2 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |