Waukesha (WI) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Waukesha, Wisconsin, United States of America. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's now guide you through the details for a complete overview.

Generally, Waukesha receives mid-range precipitation levels, with 955 mm (38 in) annually.

Monthly Precipitation Levels

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

Waukesha can be quite wet during June, receiving approximately 143 mm (5.6 in) of precipitation over 12 rainy days.

In contrast January, experiences much drier conditions, with 33 mm (1.3 in) of snowfall, spread across 9 snowy days.

June, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 305 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 Waukesha Temperature page.

Waukesha's average annual precipitation is 955 mm (38 in). Let's compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.

Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.

In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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.

Climate change is affecting precipitation patterns worldwide, including Waukesha (WI):

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

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