Green Bay weather in January 2025

Expect 23°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Green Bay in January. Check more long-term weather averages for Green Bay in January before you book your next holiday to Wisconsin in 2025/2026.

  • 23°F maximum daytime temperature in January in Green Bay23
    23°F max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in January in Green Bay11
    11 days with some rainfall
  • 5°F minimum night-time temperature in January in Green Bay5
    5°F min night temperature
  • 9 hours of daylight per day in January in Green Bay9
    9 hours of daylight per day
  • No heat & humidity in January in Green Bay0
    No heat & humidity
  • 1.2 inches monthly rainfall in January in Green Bay1.2
    1.2 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Green Bay1
    1 (Low) UV index
  • 39°F sea temperature in January in Green Bay39
    39°F sea temperature

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The January 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)  |  Imperial (°F)

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More about the USA

How cold is it in Green Bay in January?

Daytime temperatures usually reach 23°F in Green Bay in January, falling to 5°F at night.

How sunny is it in Green Bay in January?

There are normally 5 hours of bright sunshine each day in Green Bay in January - that's 51% of daylight hours.

How warm is the sea around Green Bay in January?

The average sea temperature around Green Bay in January is 39°F.

Does it rain in Green Bay in January?

There are usually 11 days with some rain in Green Bay in January and the average monthly rainfall is 1.2 inches. Rain may fall as snow in this month.

Green Bay January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 07:29 16:23
Thursday, 16th January 2025 07:24 16:40
Friday, 31st January 2025 07:11 17:00

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