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Weather in September in Wisconsin

Thinking about venturing to Wisconsin this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What is the weather like in Wisconsin in September?

Wisconsin is a region in the United States of America. September in Wisconsin generally has temperatures that range from pleasant to warm, with precipitation levels ranging from moderate to high.

Temperatures

Based on our climate data spanning from 1990-2020, the average maximum temperature is pleasant in Minocqua at 20°C to warm in Prairie du Chien at 24°C. Nighttime temperatures generally drop to 11°C in Prairie du Chien and 7°C in Minocqua.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Manitowoc with an average of 63 mm to high rainfall in Chippewa Falls with 108 mm.

Average sunshine

Meanwhile, Brookfield enjoys approximately 216 hours of sunshine, offering a mostly sunny climate that adds a pleasant and vibrant feel to the month.

To learn more about the conditions in specific areas of Wisconsin in September, check out the map below. For more details on the yearly weather, visit our Wisconsin climate page.

Where to go in Wisconsin in September

Find more information for the most popular destinations in the Wisconsin on the map below. Click on a destination dot for more detailes.

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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

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

Brookfield

In September Brookfield generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 11°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
<<   August August
<<  
27°C 
16°C 
282 hours 
91 mm 
10 days 
23°C 
11°C 
216 hours 
84 mm 
10 days 
October   >> October
>>  
16°C 
5°C 
181 hours 
72 mm 
12 days 
Climate in Brookfield

Lake Geneva

In September Lake Geneva generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 11°C and moderate monthly rainfall. So on average the conditions are perfect 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
<<   August August
<<  
27°C 
15°C 
282 hours 
103 mm 
11 days 
23°C 
11°C 
216 hours 
85 mm 
10 days 
October   >> October
>>  
16°C 
4°C 
181 hours 
75 mm 
11 days 
Climate in Lake Geneva

Oak Creek

In September Oak Creek generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 13°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
<<   August August
<<  
26°C 
18°C 
282 hours 
91 mm 
11 days 
23°C 
13°C 
216 hours 
75 mm 
10 days 
October   >> October
>>  
16°C 
6°C 
181 hours 
78 mm 
11 days 
Climate in Oak Creek

Pleasant Prairie

In September Pleasant Prairie generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 12°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
<<   August August
<<  
27°C 
16°C 
282 hours 
88 mm 
11 days 
23°C 
12°C 
216 hours 
89 mm 
10 days 
October   >> October
>>  
16°C 
5°C 
181 hours 
76 mm 
12 days 
Climate in Pleasant Prairie

Janesville

In September Janesville generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 11°C and moderate monthly rainfall. So on average the conditions are perfect 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
<<   August August
<<  
27°C 
16°C 
272 hours 
136 mm 
11 days 
24°C 
11°C 
212 hours 
79 mm 
9 days 
October   >> October
>>  
16°C 
4°C 
175 hours 
76 mm 
10 days 
Climate in Janesville

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

Is September the best time to visit Wisconsin?

We consider September to be one of the best times to travel to Wisconsin. Typically, the climate in Brookfield is perfect.

Generally speaking, May, July, August and September provide perfect weather in Brookfield. On the other hand, the weather in January, February, March, April, November and December tend to be poor.

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 travel conditions. Find out where to go with our weather planner.