About Watertown, SD

Watertown is a city of approximately 22,100 people in South Dakota, United States. Located in the Central Time Zone at 44.9°N latitude.

Across a typical year Watertown sees about 23 inches of precipitation and 41 inches of snow, with June the wettest month and January the driest. Temperatures range from January lows near 3°F up to July highs around 82°F, averaging 43°F annually — characteristic of a humid continental climate.