Green Bay weather in May 2025

Expect 66°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Green Bay in May. Check more long-term weather averages for Green Bay in May before you book your next holiday to Wisconsin in 2025/2026.

  • 66°F maximum daytime temperature in May in Green Bay66
    66°F max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in May in Green Bay10
    10 days with some rainfall
  • 45°F minimum night-time temperature in May in Green Bay45
    45°F min night temperature
  • 15 hours of daylight per day in May in Green Bay15
    15 hours of daylight per day
  • No heat & humidity in May in Green Bay0
    No heat & humidity
  • 2.9 inches monthly rainfall in May in Green Bay2.9
    2.9 inches of monthly rainfall
  • UV (maximum) index 7 (High) in May in Green Bay7
    7 (High) UV index
  • 39°F sea temperature in May in Green Bay39
    39°F sea temperature

More about Green Bay

Green Bay by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Wisconsin

Avalon Waterways: Top deals on 2025 river cruises

  • Book early & save on 2025 river cruises with Avalon Waterways
  • Filter deals by promotion, month, destination & more
  • Travel between 1st Jan & 31st Dec 2025 (inclusive)
Go to Avalon Waterways deal >>

Expires at 23:59 on Wednesday 31st Dec 2025 · View all Avalon Waterways offers

The May 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)

Back to top

More about the USA

How hot is it in Green Bay in May?

Daytime temperatures usually reach 66°F in Green Bay in May, falling to 45°F at night.

How sunny is it in Green Bay in May?

There are normally 9 hours of bright sunshine each day in Green Bay in May - that's 62% of daylight hours.

How warm is the sea around Green Bay in May?

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

Does it rain in Green Bay in May?

There are usually 10 days with some rain in Green Bay in May and the average monthly rainfall is 2.9 inches.

Green Bay May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:42 18:57
Friday, 16th May 2025 04:23 19:15
Saturday, 31st May 2025 04:11 19:29

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^