Temperature for January 2010
In January 2010 the average high temperature in Watertown, SD was 17.2°F, and this was 5.7°F cooler than the average of 22.9°F. The hottest day in January 2010 was 23 January when the temperature reached 34.0°F. Overnight the average temperature in January is 3.8°F and in 2010 the average overnight temperature was 1.2°F cooler at 2.7°F.