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 (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	-5	-2	4	12	19	24	27	25	21	14	6	-2
Min temperature (night-time)	-15	-12	-6	1	7	12	15	14	10	4	-3	-11
Heat & Humidity	0	0	0	0	0	0	L	L	0	0	0	0
Sea temperature	4	3	2	3	4	9	15	20	18	12	8	5

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 (mm)	30	27	52	64	73	85	81	89	88	57	56	40

More about Green Bay

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 -5°C 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.

-5
-5°C max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
-15
-15°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
30
30 mm of monthly rainfall
1
1 (Low) UV index
4
4°C sea temperature

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Green Bay weather in February

Expect daytime maximum temperatures of -2°C 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.

-2
-2°C max day temperature
6
6 hours of sunshine per day
8
8 days with some rainfall
-12
-12°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
27
27 mm of monthly rainfall
2
2 (Low) UV index
3
3°C sea temperature

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Green Bay weather in March

Expect daytime maximum temperatures of 4°C 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 52 mm of rainfall in the month, which might fall as snow.

4
4°C max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
-6
-6°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
52
52 mm of monthly rainfall
3
3 (Moderate) UV index
2
2°C sea temperature

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Green Bay weather in April

Expect daytime maximum temperatures of 12°C 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 64 mm of rainfall in the month.

12
12°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
1
1°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
64
64 mm of monthly rainfall
5
5 (Moderate) UV index
3
3°C sea temperature

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Green Bay weather in May

Expect daytime maximum temperatures of 19°C 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 73 mm of rainfall in the month.

19
19°C max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
7
7°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
73
73 mm of monthly rainfall
7
7 (High) UV index
4
4°C sea temperature

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Green Bay weather in June

Expect daytime maximum temperatures of 24°C 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 85 mm of rainfall in the month.

24
24°C max day temperature
10
10 hours of sunshine per day
10
10 days with some rainfall
12
12°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
85
85 mm of monthly rainfall
8
8 (Very High) UV index
9
9°C sea temperature

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Green Bay weather in July

Expect daytime maximum temperatures of 27°C 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 81 mm of rainfall in the month.

27
27°C max day temperature
10
10 hours of sunshine per day
10
10 days with some rainfall
15
15°C min night temperature
15
15 hours of daylight per day
L
Low heat & humidity
81
81 mm of monthly rainfall
8
8 (Very High) UV index
15
15°C sea temperature

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Green Bay weather in August

Expect daytime maximum temperatures of 25°C 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 89 mm of rainfall in the month.

25
25°C max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
14
14°C min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
89
89 mm of monthly rainfall
7
7 (High) UV index
20
20°C sea temperature

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Green Bay weather in September

Expect daytime maximum temperatures of 21°C 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 88 mm of rainfall in the month.

21
21°C max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
10
10°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
88
88 mm of monthly rainfall
5
5 (Moderate) UV index
18
18°C sea temperature

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Green Bay weather in October

Expect daytime maximum temperatures of 14°C 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 57 mm of rainfall in the month.

14
14°C max day temperature
5
5 hours of sunshine per day
10
10 days with some rainfall
4
4°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
57
57 mm of monthly rainfall
3
3 (Moderate) UV index
12
12°C sea temperature

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Green Bay weather in November

Expect daytime maximum temperatures of 6°C 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 56 mm of rainfall in the month.

6
6°C max day temperature
4
4 hours of sunshine per day
10
10 days with some rainfall
-3
-3°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
56
56 mm of monthly rainfall
2
2 (Low) UV index
8
8°C sea temperature

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Green Bay weather in December

Expect daytime maximum temperatures of -2°C 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 40 mm of rainfall in the month, which might fall as snow.

-2
-2°C max day temperature
4
4 hours of sunshine per day
11
11 days with some rainfall
-11
-11°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
40
40 mm of monthly rainfall
1
1 (Low) UV index
5
5°C sea temperature

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