Wauwatosa (WI) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Wauwatosa, Wisconsin, United States of America. This average is based on long-term data collected between 1990 and 2020. Now, let's break down all the details for a clearer picture.

Generally, Wauwatosa experiences moderate precipitation patterns, averaging 961 mm (38 in) yearly.

Monthly Precipitation Levels

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

The climate in Wauwatosa shows significant variation throughout the year. Expect 139 mm (5.5 in) of precipitation during the wettest month June, distributed over 12 rainy days.

In contrast, January offers drier and sunnier days, with around 34 mm (1.3 in) of snowfall over 10 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 -1°C (30°F). For more detailed insights into the city's temperatures, visit our Wauwatosa Temperature page.

Wauwatosa's average annual precipitation is 961 mm (38 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.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

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

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.

Climate change is affecting precipitation patterns worldwide, including Wauwatosa (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 Wauwatosa (WI)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Wauwatosa (WI) Climate page.