Green Bay weather in August 2025

Expect 25°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Green Bay in August. Check more long-term weather averages for Green Bay in August before you book your next holiday to Wisconsin in 2025/2026.

  • 25°C maximum daytime temperature in August in Green Bay25
    25°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in August in Green Bay10
    10 days with some rainfall
  • 14°C minimum night-time temperature in August in Green Bay14
    14°C min night temperature
  • 14 hours of daylight per day in August in Green Bay14
    14 hours of daylight per day
  • Low heat & humidity in August in Green BayL
    Low heat & humidity
  • 89 mm monthly rainfall in August in Green Bay89
    89 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Green Bay7
    7 (High) UV index
  • 20°C sea temperature in August in Green Bay20
    20°C sea temperature

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The August weather guide for Wisconsin (Green Bay) 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.

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

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How hot is it in Green Bay in August?

Daytime temperatures usually reach 25°C in Green Bay in August with low heat and humidity, falling to 14°C at night.

How sunny is it in Green Bay in August?

There are normally 9 hours of bright sunshine each day in Green Bay in August - that's 64% of daylight hours.

How warm is the sea around Green Bay in August?

The average sea temperature around Green Bay in August is 20°C.

Does it rain in Green Bay in August?

There are usually 10 days with some rain in Green Bay in August and the average monthly rainfall is 89mm.

Green Bay August sunrise & sunset times

Browse the sunrise and sunset times for Green Bay in August 2025. Select a month to view Green Bay sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:39 19:17
Saturday, 16th August 2025 04:57 18:55
Sunday, 31st August 2025 05:14 18:30

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