Watertown, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.2 °F (low) to 79.4 °F (high). Annual precipitation averages 54.3 Inches. 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 | 41.5 °F | 65.0 °F | 4.18 in. |
| February | 44.5 °F | 68.5 °F | 3.23 in. |
| March | 49.1 °F | 74.4 °F | 4.2 in. |
| April | 55.2 °F | 79.6 °F | 3.34 in. |
| May | 62.6 °F | 86.3 °F | 3.51 in. |
| June | 69.3 °F | 89.4 °F | 8.15 in. |
| July | 71.3 °F | 90.9 °F | 6.93 in. |
| August | 71.5 °F | 90.2 °F | 7.26 in. |
| September | 68.5 °F | 87.3 °F | 6.03 in. |
| October | 59.3 °F | 80.7 °F | 2.73 in. |
| November | 49.3 °F | 73.2 °F | 1.83 in. |
| December | 44.3 °F | 67.3 °F | 2.91 in. |
| Annual | 57.2 °F | 79.4 °F | 54.3 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |