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Green Bay weather in January

Weather in Green Bay: January


	Average day temperature:	24.4°F
	Average night temperature:	18.2°F

	Sea water temperature:	32.4°F

	Number of sunny days:	5 days
	Day length:	8.9 - 9.8 hours

	Number of rainy days:	0 days
	Precipitation totals:	0.4 in.

more information

14 days
forecast

Green Bay

sea water
temperature

Green Bay

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2025

2024

2023

-20

-10

Day temperature

Night temperature

The highest day temperature during January of 2025 was 40°F. At the same time the lowest night temperature was -10°F. Daily and nightly averages during January were 22.4°F and 14.2°F.

Show year:

2025

2024

2023

The average sea water temperature in January of 2025 was 32.2°F. The highest and lowest sea temperatures during the month were 32.7°F and 32.0°F.

	Sunny days
	Partly cloudy days
	Cloudy days

16%

26%

58%

Mostly all days in January are cloudy but sunny and partly cloudy days are also possible.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

0.3

0.6

0.9

1.1

1.4

1.7

2.0

2.3

1.1

1.2

1.5

1.7

1.3

1.6

1.1

1.2

1.5

1.7

1.3

1.6

Precipitation total value in Green Bay in January is 0.4 in. Other months of the year show relatively similar values.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

1.9

3.7

5.6

7.5

9.4

11.2

13.1

9.5

10.9

9.9

9.0

8.0

7.5

8.7

9.0

10.9

10.1

9.5

10.9

9.9

9.0

8.0

7.5

8.7

9.0

10.9

10.1

9.4

The average wind speed value in January is 9.4 mph

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

1.6

3.2

4.8

6.4

8.0

9.6

11.2

3.3

4.5

6.1

8.0

9.1

9.3

9.0

7.8

5.2

4.9

4.4

3.3

4.5

6.1

8.0

9.1

9.3

9.0

7.8

5.2

4.9

4.4

3.7

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in January is: 3.7.