October weather forecast
Green Bay, WI

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The sun setting over Green Bay in Wisconsin
The sun setting over Green Bay in Wisconsin

Weather in October

October witnesses a noticeable drop in temperature, and the vibrant hues of fall are in full display in Green Bay. With decreasing daylight hours, the longer and cooler nights make their presence felt. The weather during October is notorious for its unpredictability with temperatures oscillating between highs of 55.8°F and lows around 41.9°F. The fall foliage, coupled with the crisp autumn air, paints a picturesque view, making Green Bay a sight to behold. So, while there is a nip in the air, there is an undeniable charm that October carries with its beautiful blend of warm autumn hues and mild sunshine.

Temperature

As September shifts into October, a slight alteration in temperatures is observed, with average highs reducing from a pleasant 69.6°F to a mild 55.8°F. Throughout October, the temperature falls to an average low of 41.9°F.

Humidity

In October, the average relative humidity is 78%.

Rainfall

In Green Bay, in October, during 12.1 rainfall days, 2.68" of precipitation is typically accumulated. In Green Bay, during the entire year, the rain falls for 130.8 days and collects up to 24.8" of precipitation.

Snowfall

January through May, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 1 snowfall days, it receives 0.31" of snow. Throughout the year, in Green Bay, there are 63.7 snowfall days, and 23.27" of snow is accumulated.

Ocean temperature

In Green Bay, the average seawater temperature in October is 54°F.
Note: Immersing oneself in 54°F at sub14°F temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.

Daylight

In October, the average length of the day is 10h and 58min.
On the first day of the month, sunrise is at 6:49 am and sunset at 6:33 pm. On the last day of October, sunrise is at 7:28 am and sunset at 5:43 pm CDT.

Sunshine

In October, the average sunshine is 5.2h.

UV index

In October, the average daily maximum UV index in Green Bay is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily maximum UV index of 2 in October translates into the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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FAQ

What is the temperature in October in Green Bay?

The average high-temperature, in October, in Green Bay, is 55.8°F, while the average low-temperature is 41.9°F.

What is the average humidity in October in Green Bay?

In Green Bay, the average relative humidity in October is 78%.

How much does it rain in Green Bay in October?

In Green Bay, during October, the rain falls for 12.1 days and regularly aggregates up to 2.68" of precipitation.

When does it start to snow in Green Bay?

October is the first month it typically snows in Green Bay, Wisconsin. Throughout October, in the average 1 snowfall days, it receives 0.31" of snow.

What is the water temperature in October in Green Bay?

In October, the average ocean temperature in Green Bay is 54°F. Swimming in 54°F is considered life-threatening. Even a few minutes in 55.4°F water is uncomfortable, and swimming below 50°F may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Green Bay have in October?

The average day length in October in Green Bay, Wisconsin, is 10h and 58min.

What time are sunrise and sunset in October in Green Bay?

In October, on the first day of the month, sunrise is at 6:49 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:43 pm CDT.

How long on average sun shines in October in Green Bay?

In Green Bay, the average sunshine duration in October is 5.2h.

What is the UV index reading in October in Green Bay?

In Green Bay, the average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASOctoberND
Sep
October
Nov
Average high temperature
69.6°F
55.8°F
41.7°F
Average low temperature
52.3°F
41.9°F
30.7°F
Average pressure
30.02"Hg
29.98"Hg
30.06"Hg
Average wind speed
8.1mph
9.5mph
9.9mph
Average max. wind speed
8.4mph
10.3mph
10.6mph
Average wind speed gusts
13.4mph
15.5mph
15.7mph
Average humidity
79%
78%
78%
Average rainfall
1.57"
2.68"
1.57"
Average rainfall days
11.6
12.1
8.3
Average snowfall
0"
0.31"
1.5"
Average snowfall days
0
1
5.2
Average sea temperature
63.8°F
54°F
46.6°F
Average daylight
12h 3min
11h 0min
9h 4min
Average sunshine
8h 2min
5h 1min
4h 5min
Average sunshine days
17
15.2
17
Average UV index
3
2
1
Average cloud cover
35%
47%
50%
Average visibility
6mi
6mi
6mi

Average temperature in October
Green Bay, WI

Average temperature in October - Green Bay, WI
  • Average high temperature in October: 55.8°F

The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (22.6°F).

  • Average low temperature in October: 41.9°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).

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Average pressure in October
Green Bay, WI

Average pressure in October - Green Bay, WI
  • Average pressure in October: 29.98"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in October
Green Bay, WI

Average wind speed in October - Green Bay, WI
  • Average wind speed in October: 9.5mph

The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).

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Average humidity in October
Green Bay, WI

Average humidity in October - Green Bay, WI
  • Average humidity in October: 78%

The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and May (76%).

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Average rainfall in October
Green Bay, WI

Average rainfall in October - Green Bay, WI
  • Average rainfall in October: 2.68"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (1.18").

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Average rainfall days in October
Green Bay, WI

Average rainfall days in October - Green Bay, WI
  • Average rainfall days in October: 12.1 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is February (3.7 days).

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Average snowfall in October
Green Bay, WI

Average snowfall in October - Green Bay, WI
  • Average snowfall in October: 0.31"

The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in October
Green Bay, WI

Average snowfall days in October - Green Bay, WI
  • Average snowfall days in October: 1 days

The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in October
Green Bay, WI

Average sea temperature in October - Green Bay, WI
  • Average sea temperature in October: 54°F

The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is February (36.1°F).

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Average daylight in October /
Average sunshine in October
Green Bay, WI

Average daylight in October / Average sunshine in October - Green Bay, WI
  • Average daylight in October: 11h and 0min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in October: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).

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Average sunshine days in October
Green Bay, WI

Average sunshine days in October - Green Bay, WI
  • Average sunshine days in October: 15.2 days

The months with the most sunshine days are September and November (17 days).
The month with the least sunshine days is April (11.6 days).

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Average UV index in October
Green Bay, WI

Average UV index in October - Green Bay, WI
  • Average UV index in October: 2

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in October
Green Bay, WI

Average cloud cover in October - Green Bay, WI
  • Average cloud cover in October: 47

The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in October
Green Bay, WI

Average visibility in October - Green Bay, WI
  • Average visibility in October: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

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Green Bay, Wisconsin, USA

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