The highest day temperature in April 2026 was 84°F. The lowest night temperature was 21°F. The average values for day and night temperatures during April were 51.1°F и 40.3°F respectivly.

The average sea surface temperature in April 2026 for Green Bay was 38.9°F. The maximum and minimum values were 34.6°F and 45.2°F respectively.

Most of the days in April are gloomy but you can also expect sunny days.

Precipitation total in April for Green Bay is 1.4 in. It makes april one of the most rainy months of the year.

The average wind speed in April is 11.0 mph. It makes April the most windy month of the year for Green Bay.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Green Bay in April is 5.4 hours.