Green Bay weather by month

Check out Green Bay weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature
Rainfall
Sunshine & daylight
UV levels & humidity

Temperature in Green Bay (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	23	28	39	54	66	75	81	77	70	57	43	28
Min temperature (night-time)	5	10	21	34	45	54	59	57	50	39	27	12
Heat & Humidity	0	0	0	0	0	0	L	L	0	0	0	0
Sea temperature	39	37	36	37	39	48	59	68	64	54	46	41

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Green Bay

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	5	6	6	7	9	10	10	9	7	5	4	4
Daily hours of daylight	9	10	12	14	15	15	15	14	12	11	10	9
UV Index (Maximum)	1	2	3	5	7	8	8	7	5	3	2	1

Rainfall in Green Bay

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	11	8	11	11	10	10	10	10	10	10	10	11
Average monthly rainfall (inches)	1.2	1.1	2.0	2.5	2.9	3.3	3.2	3.5	3.5	2.2	2.2	1.6

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Green Bay by month

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

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The climate guide for Wisconsin (Green Bay) shows long term monthly 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.

What's the climate like in Green Bay?

Green Bay has a cold climate with warm summers and some rainfall in all months.

Green Bay weather in January

Expect daytime maximum temperatures of 23°F in Green Bay, Wisconsin in January based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall, which might fall as snow.

23
23°F max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
5
5°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
1.2
1.2 inches of monthly rainfall
1
1 (Low) UV index
39
39°F sea temperature

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Green Bay weather in February

Expect daytime maximum temperatures of 28°F in Green Bay, Wisconsin in February based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

28
28°F max day temperature
6
6 hours of sunshine per day
8
8 days with some rainfall
10
10°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
1.1
1.1 inches of monthly rainfall
2
2 (Low) UV index
37
37°F sea temperature

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Green Bay weather in March

Expect daytime maximum temperatures of 39°F in Green Bay, Wisconsin in March based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 2.0 inches of rainfall in the month, which might fall as snow.

39
39°F max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
21
21°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
2.0
2.0 inches of monthly rainfall
3
3 (Moderate) UV index
36
36°F sea temperature

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Green Bay weather in April

Expect daytime maximum temperatures of 54°F in Green Bay, Wisconsin in April based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 2.5 inches of rainfall in the month.

54
54°F max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
34
34°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
2.5
2.5 inches of monthly rainfall
5
5 (Moderate) UV index
37
37°F sea temperature

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Green Bay weather in May

Expect daytime maximum temperatures of 66°F in Green Bay, Wisconsin in May based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 2.9 inches of rainfall in the month.

66
66°F max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
45
45°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
2.9
2.9 inches of monthly rainfall
7
7 (High) UV index
39
39°F sea temperature

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Green Bay weather in June

Expect daytime maximum temperatures of 75°F in Green Bay, Wisconsin in June based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 3.3 inches of rainfall in the month.

75
75°F max day temperature
10
10 hours of sunshine per day
10
10 days with some rainfall
54
54°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.3
3.3 inches of monthly rainfall
8
8 (Very High) UV index
48
48°F sea temperature

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Green Bay weather in July

Expect daytime maximum temperatures of 81°F in Green Bay, Wisconsin in July based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 3.2 inches of rainfall in the month.

81
81°F max day temperature
10
10 hours of sunshine per day
10
10 days with some rainfall
59
59°F min night temperature
15
15 hours of daylight per day
L
Low heat & humidity
3.2
3.2 inches of monthly rainfall
8
8 (Very High) UV index
59
59°F sea temperature

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Green Bay weather in August

Expect daytime maximum temperatures of 77°F in Green Bay, Wisconsin in August based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 3.5 inches of rainfall in the month.

77
77°F max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
57
57°F min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
3.5
3.5 inches of monthly rainfall
7
7 (High) UV index
68
68°F sea temperature

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Green Bay weather in September

Expect daytime maximum temperatures of 70°F in Green Bay, Wisconsin in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 3.5 inches of rainfall in the month.

70
70°F max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
50
50°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
3.5
3.5 inches of monthly rainfall
5
5 (Moderate) UV index
64
64°F sea temperature

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Green Bay weather in October

Expect daytime maximum temperatures of 57°F in Green Bay, Wisconsin in October based on long-term weather averages. There are 5 hours of sunshine per day on average with 10 days with some rainfall and typically 2.2 inches of rainfall in the month.

57
57°F max day temperature
5
5 hours of sunshine per day
10
10 days with some rainfall
39
39°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
2.2
2.2 inches of monthly rainfall
3
3 (Moderate) UV index
54
54°F sea temperature

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Green Bay weather in November

Expect daytime maximum temperatures of 43°F in Green Bay, Wisconsin in November based on long-term weather averages. There are 4 hours of sunshine per day on average with 10 days with some rainfall and typically 2.2 inches of rainfall in the month.

43
43°F max day temperature
4
4 hours of sunshine per day
10
10 days with some rainfall
27
27°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
2.2
2.2 inches of monthly rainfall
2
2 (Low) UV index
46
46°F sea temperature

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Green Bay weather in December

Expect daytime maximum temperatures of 28°F in Green Bay, Wisconsin in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 11 days with some rainfall and typically 1.6 inches of rainfall in the month, which might fall as snow.

28
28°F max day temperature
4
4 hours of sunshine per day
11
11 days with some rainfall
12
12°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
1.6
1.6 inches of monthly rainfall
1
1 (Low) UV index
41
41°F sea temperature

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