Wisconsin weather in August 2025

Expect 26°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Wisconsin in August. Check more long-term weather averages for Wisconsin in August before you book your next holiday to Wisconsin in 2025/2026.

  • 26°C maximum daytime temperature in August in Wisconsin (Milwaukee)26
    26°C max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in August in Wisconsin (Milwaukee)9
    9 days with some rainfall
  • 16°C minimum night-time temperature in August in Wisconsin (Milwaukee)16
    16°C min night temperature
  • 14 hours of daylight per day in August in Wisconsin (Milwaukee)14
    14 hours of daylight per day
  • Low heat & humidity in August in Wisconsin (Milwaukee)L
    Low heat & humidity
  • 90 mm monthly rainfall in August in Wisconsin (Milwaukee)90
    90 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Wisconsin (Milwaukee)8
    8 (Very High) UV index
  • 21°C sea temperature in August in Wisconsin (Milwaukee)21
    21°C sea temperature

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The August weather guide for Wisconsin (Milwaukee) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Wisconsin destinations

Below are average maximum temperatures at popular countries, regions and places in Wisconsin in August. Select a holiday destination to see more weather parameters.

All Wisconsin destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in Wisconsin in August?

Daytime temperatures usually reach 26°C in Milwaukee, Wisconsin in August with low heat and humidity, falling to 16°C at night.

How sunny is it in Wisconsin in August?

There are normally 9 hours of bright sunshine each day in Milwaukee, Wisconsin in August - that's 65% of daylight hours.

How warm is the sea around Wisconsin in August?

The average sea temperature around Milwaukee, Wisconsin in August is 21°C.

Does it rain in Wisconsin in August?

There are usually 9 days with some rain in Milwaukee, Wisconsin in August and the average monthly rainfall is 90mm.

Wisconsin August sunrise & sunset times

Browse the sunrise and sunset times for Wisconsin in August 2025. Select a month to view Wisconsin sunrise and sunset times for the next 12 months. The Wisconsin sunrise and sunset times shown below are for Milwaukee.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:43 19:12
Saturday, 16th August 2025 04:59 18:52
Sunday, 31st August 2025 05:15 18:28

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