With a population of around 31,900, Watertown sits in Massachusetts, United States. The city operates in the Eastern Time Zone.
Recent weather here gives a sense of typical conditions: in 2025, Watertown recorded a mean annual temperature of 51°F, ranging from 2°F lows in January to 102°F highs in June, with about 40 inches of precipitation across the year.
View historical weather for Watertown · More cities in Massachusetts