Watertown (WI) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Watertown, Wisconsin, United States of America. This average is based on long-term data collected between 1990 and 2020. Now, let's explore all the details to give you a full picture.

On average, Watertown receives a reasonable amount of rain/snowfall, with an annual precipitation of 983 mm (39 in). Despite this overall moderate level, the city experiences distinct dry season during certain months throughout the year, as illustrated in the precipitation charts below.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Watertown can be quite wet during June, receiving approximately 150 mm (5.9 in) of precipitation over 13 rainy days.

In contrast January, experiences much drier conditions, with 35 mm (1.4 in) of snowfall, spread across 9 snowy days.

June, the wettest month, has a maximum daytime temperature of 26°C (79°F). The city receives 297 hours of sunshine in this period. During the driest month January you can expect a temperature of -3°C (27°F). For more detailed insights into the city's temperatures, visit our Watertown Temperature page.

Watertown's average annual precipitation is 983 mm (39 in). Let's compare this to some popular worldwide tourist destinations:

The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

The proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA, over 31.5 meters (103 feet) fell during the winter of 1972.

For more detailed information about Watertown (WI)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Watertown (WI) Climate page.