Green Bay weather in October

In October, Green Bay sees average daytime highs of 57°F and overnight lows near 41°F, with 2.8 in of precipitation across 9.5 wet days and about 10.7 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 63°F in the first days to 51°F by the end. The sky is clear or mostly clear about 26% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of October to 10 hours by month's end. Set against the rest of the year, October is Green Bay's 5th-clearest and 3rd-windiest month. For the whole year in context, see Green Bay's year-round climate.

Daytime high
57°
6th warmest
Overnight low
41°
7th coldest
Precipitation
2.8 in
9.5 wet days
Daylight
10 h 42 min
6:15 AM – 4:59 PM
Cloud cover
64%
5th clearest
Wind
9 mph
3rd windiest
Solar energy
2.73 kWh/m²
Travel score
4.0
out of 10

Green Bay is city in and county seat of Brown County, Wisconsin, United States.

Density
727/km²
people per km²
Founded
1634

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 63°F in the first days to 51°F by the end.

A typical October day in Green Bay reaches about 57°F in the afternoon and slips back to 41°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 45°F and 70°F. Set against its neighbours, October runs about 14°F cooler than September and about 14°F warmer than November.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
16446
26346
36345
46245
56244
66244
76144
86143
96043
106043
115942
125942
135842
145841
155741
165741
175640
185640
195540
205539
215439
225439
235338
245338
255238
265237
275137
285137
295136
305036
315036

How October really feels in Green Bay

Once humidity and wind are folded in, October averages 0 days that feel above 90°F and 8 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
8
wind chill below the day's low

The story in October is cold — wind chill drags the overnight "feels like" below the raw low.

Green Bay weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan26° / 12°1.57.66.990.0
Feb29° / 14°1.36.45.610.10.0
Mar40° / 24°2.28.34.411.60.4
Apr53° / 35°3.111.4313.23.0
May66° / 47°3.411.40.114.65.7
Jun76° / 57°3.611.2015.36.5
Jul80° / 62°3.511.30156.4
Aug78° / 60°3.410.4013.96.8
Sep70° / 52°2.69.1012.36.7
Oct57° / 41°2.89.50.310.74.0
Nov43° / 29°2.18.22.49.40.7
Dec31° / 19°1.87.35.68.70.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54753
64753
74654
84654
94654
104555
114555
124555
134456
144357
154357
164258
174258
184159
194159
203961
213961
223862
233862
243763
253763
263763
273763
283664
293664
303664
313664

Chance of precipitation in October

Any precipitationSnow

Green Bay gets around 2.8 in of rain and snow over 9.5 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 30% and peaks near 32% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1320
2320
3320
4310
5310
6310
7310
8300
9300
10300
11300
12300
13300
14301
15301
16301
17301
18301
19301
20301
21301
22302
23302
24302
25292
26292
27292
28282
29283
30283
31283

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
185852
287742
388741
489641
589641
691531
791531
891531
992431
1092431
1193421
1293421
1395320
1495320
1596310
1696310
1796310
1896310
1996310
2096310
2196310
2296310
2398200
2498200
2598200
2698200
2798200
2898200
2999100
3099100
3199100

Wind in October

Winds average 9 mph in October.

Across October, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over October. Sunrise moves from 5:56 AM to 6:35 AM, and sunset from 5:26 PM to 4:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.55:565:26
211.55:575:25
311.45:585:23
411.45:595:21
511.36:015:19
611.26:025:17
711.26:035:15
811.16:055:13
911.16:065:12
1011.06:075:10
1111.06:085:08
1210.96:105:06
1310.96:115:04
1410.86:125:03
1510.86:145:01
1610.76:154:59
1710.76:164:58
1810.66:184:56
1910.66:194:54
2010.56:204:53
2110.56:224:51
2210.46:234:49
2310.46:244:48
2410.36:264:46
2510.36:274:45
2610.26:284:43
2710.26:304:42
2810.26:314:40
2910.16:334:39
3010.16:344:37
3110.06:354:36

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.73 kWh/m².

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 6.32 kWh/m² in June across the year — October's 2.73 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.3Moderate
43.3Moderate
53.3Moderate
63.2Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.0Moderate
113.0Moderate
122.9Moderate
132.9Moderate
142.8Moderate
152.8Moderate
162.7Moderate
172.7Moderate
182.6Moderate
192.6Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.3Moderate
272.3Moderate
282.3Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in October

Is October a good time to visit Green Bay?

Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.0
Sightseeing
6th-best month of the year
0.4
Beach & pool
6th-best month of the year

October is a reasonable time to visit Green Bay for sightseeing.

What to pack for Green Bay in October

From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In October, Green Bay sees daytime highs around 57°F and nights near 41°F. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Green Bay in October

The nearest coast averages about 55°F in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 10 mi away) is warmest in August at about 69°F and coldest in March near 34°F.

It's comfortable for a long swim from Aug 9 to Aug 23 — about 0.5 months when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan37Bracing
Feb35Bracing
Mar34Bracing
Apr37Bracing
May43Bracing
Jun52Bracing
Jul65Cool
Aug69Refreshing
Sep64Cool
Oct55Bracing
Nov46Bracing
Dec39Bracing

UV index in Green Bay in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Green Bay peaks around June 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 18UV 9Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May8Very high
Jun9Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Green Bay?

Green Bay sits at 44.5°N, 88.0°W, 591 ft above sea level, in United States. The nearest listed city is Ashwaubenon, 3.7 mi away.

Topography around Green Bay

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Green Bay.

Within 2 miles, the terrain around Green Bay has only modest variations in elevation — a maximum elevation change of 135 ft around an average of 597 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 433 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 728 ft.

The land around Green Bay is covered by artificial surfaces (51%) and trees (30%) within 2 miles, trees (29%) and cropland (21%) within 10 miles, and trees (30%), cropland (30%) and water (28%) within 50 miles.

2 miles
135 ft
10 miles
433 ft
50 miles
728 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Ashwaubenon 3.7 mi · Howard 3.7 mi · De Pere 5.0 mi · Bellevue 6.8 mi · Kaukauna 21 mi · Appleton 27 mi · Menasha 30 mi · Neenah 32 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Green Bay (44.5192°, -88.0198°, elevation 591 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).