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Wisconsin weather in August

Are you planning a trip to Wisconsin in August and wondering what kind of weather to expect? This page has all the details you need.

What is the weather like in Wisconsin in August?

Wisconsin is a region in the United States of America. August in Wisconsin generally has warm temperatures, with precipitation levels ranging from moderate to high. During August, summer is in full swing.

The average maximum temperatures are warm and range from 24°C in Minocqua to 28°C in Onalaska. Nighttime temperatures generally drop to 17°C in Onalaska and 12°C in Minocqua.

In August, precipitation varies across different areas. From moderate rainfall in Two Rivers with an average of 67 mm to high rainfall in Baldwin with 145 mm. The city Lake Geneva usually sees around 282 hours of sunlight, indicating many sunny days.

For a closer look at August's conditions in Wisconsin, see the map below. For a more detailed look at Wisconsin's yearly weather, check out our Wisconsin climate page.

Where to go in Wisconsin in August

Find the average weather conditions in August for the most popular destinations in Wisconsin on the map below. Click on a destination dot for more detailed information.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations in Wisconsin

What is the weather like in August for the 5 most popular destinations in Wisconsin?

Average weather in Lake Geneva

In August Lake Geneva generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 15°C and high monthly rainfall. So on average the conditions are pleasant that month.

Lake Geneva
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   July July
<<  
28°C 
16°C 
319 hours 
97 mm 
10 days 
27°C 
15°C 
282 hours 
103 mm 
11 days 
23°C 
11°C 
216 hours 
85 mm 
10 days 
Climate in Lake Geneva

Average weather in Brookfield

In August Brookfield generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 16°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Brookfield
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   July July
<<  
28°C 
16°C 
319 hours 
98 mm 
9 days 
27°C 
16°C 
282 hours 
91 mm 
10 days 
23°C 
11°C 
216 hours 
84 mm 
10 days 
Climate in Brookfield

Average weather in Janesville

In August Janesville generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 16°C and high monthly rainfall. So on average the conditions are pleasant that month.

Janesville
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   July July
<<  
28°C 
16°C 
308 hours 
99 mm 
10 days 
27°C 
16°C 
272 hours 
136 mm 
11 days 
24°C 
11°C 
212 hours 
79 mm 
9 days 
Climate in Janesville

Average weather in Oak Creek

In August Oak Creek generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 18°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Oak Creek
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   July July
<<  
27°C 
18°C 
319 hours 
89 mm 
9 days 
26°C 
18°C 
282 hours 
91 mm 
11 days 
23°C 
13°C 
216 hours 
75 mm 
10 days 
Climate in Oak Creek

Average weather in Pleasant Prairie

In August Pleasant Prairie generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 16°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Pleasant Prairie
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   July July
<<  
28°C 
16°C 
319 hours 
97 mm 
10 days 
27°C 
16°C 
282 hours 
88 mm 
11 days 
23°C 
12°C 
216 hours 
89 mm 
10 days 
Climate in Pleasant Prairie

Is your destination not in the list? Have a look at other destinations in Wisconsin, in the United States of America.

Is August the best time to visit Wisconsin?

Given the typically pleasant weather conditions in Lake Geneva, August might be a good time to visit Wisconsin.

On average, the best time to visit Wisconsin is in May, July and September with generally perfect weather in Lake Geneva. On the other hand, the months of January, February, March, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Wisconsin. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.