Sheboygan weather in September

In September, Sheboygan sees average daytime highs of 69°F and overnight lows near 58°F, with 2.8 in of rain across 9.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 73°F in the first days to 64°F by the end. The sky is clear or mostly clear about 37% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Sheboygan's 2nd-clearest and 8th-windiest month. For the whole year in context, see Sheboygan's year-round climate.

Daytime high
69°
4th warmest
Overnight low
58°
9th coldest
Rainfall
2.8 in
9.3 wet days
Daylight
12 h 18 min
5:36 AM – 5:54 PM
Cloud cover
54%
2nd clearest
Wind
10 mph
8th windiest
Solar energy
4.29 kWh/m²
Travel score
6.5
out of 10

Sheboygan is city in and county seat of Sheboygan County, Wisconsin, United States.

Density
1,293/km²
people per km²
Founded
1846

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 73°F in the first days to 64°F by the end.

A typical September day in Sheboygan reaches about 69°F in the afternoon and slips back to 58°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 77°F. Set against its neighbours, September runs about 7°F cooler than August and about 12°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17463
27362
37362
47362
57361
67261
77261
87260
97160
107160
117159
127059
137059
146958
156958
166958
176857
186857
196856
206756
216756
226655
236655
246655
256554
266554
276453
286453
296453
306352

How September really feels in Sheboygan

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 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
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Sheboygan weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 17°1.68.26.99.10.0
Feb29° / 17°1.56.75.510.20.0
Mar37° / 25°2.18.74.311.60.0
Apr47° / 36°3.410.82.213.21.5
May57° / 46°3.310.3014.54.1
Jun69° / 58°3.39.9015.26.4
Jul76° / 65°3.110014.97.0
Aug76° / 65°3.410.3013.87.0
Sep69° / 58°2.89.3012.36.5
Oct57° / 46°2.99.70.110.84.0
Nov45° / 36°2.18.51.69.51.0
Dec34° / 25°1.97.55.38.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45644
55743
65743
75644
85644
95644
105446
115446
125347
135347
145347
155347
165248
175248
185248
195149
205149
215149
225050
235050
245050
254951
264951
274852
284753
294852
304753

Chance of precipitation in September

Any precipitation

Sheboygan gets around 2.8 in of rain over 9.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
228
328
428
528
628
729
829
930
1030
1131
1232
1332
1433
1533
1633
1733
1833
1933
2033
2133
2234
2334
2433
2533
2633
2733
2832
2932
3031

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1202424265
2222424264
3242424254
4252423243
5272423233
6292422222
7312422212
8322422202
9342422191
10352422181
11372422171
12382422151
13402422141
14412421131
15422421121
16442421110
17452421100
1847242090
1949241980
2052231870
2154231760
2256221660
2358221550
2460211450
2563201340
2664201240
2766191230
2868181130
2970171030
307316920

Wind in September

Winds average 10 mph in September.

Across September, daily wind ranges from about 9 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
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
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2811light breeze
2911light breeze
3011light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over September. Sunrise moves from 5:19 AM to 5:53 AM, and sunset from 6:22 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:196:22
213.05:206:20
313.05:216:19
412.95:226:17
512.95:246:15
612.85:256:13
712.85:266:11
812.75:276:09
912.75:286:07
1012.65:296:05
1112.65:306:04
1212.55:326:02
1312.45:336:00
1412.45:345:58
1512.35:355:56
1612.35:365:54
1712.25:375:52
1812.25:395:50
1912.15:405:48
2012.15:415:46
2112.05:425:44
2212.05:435:43
2311.95:455:41
2411.95:465:39
2511.85:475:37
2611.85:485:35
2711.75:495:33
2811.75:505:31
2911.65:525:29
3011.65:535:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.29 kWh/m².

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 6.53 kWh/m² in June across the year — September's 4.29 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.0Bright
214.0Bright
224.0Moderate
233.9Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Sheboygan?

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

6.5
Sightseeing
3rd-best month of the year
3.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Sheboygan for sightseeing.

What to pack for Sheboygan in September

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

In September, Sheboygan sees daytime highs around 69°F and nights near 58°F. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Sheboygan in September

The nearest coast averages about 65°F in September — 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 36°F.

It's comfortable for a long swim from Aug 8 to Aug 24 — about 0.6 months when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May41Bracing
Jun52Bracing
Jul65Cool
Aug69Refreshing
Sep65Cool
Oct55Bracing
Nov46Bracing
Dec41Bracing

UV index in Sheboygan in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

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

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 18UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May8Very high
Jun9Very high
Jul8Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Sheboygan in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Sheboygan is worst in June — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2116 µg/m³Nov 138 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar14Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul15Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Sheboygan?

Sheboygan sits at 43.8°N, 87.7°W, 630 ft above sea level, in United States. The nearest listed city is Manitowoc, 24 mi away.

Topography around Sheboygan

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

Within 2 miles, the terrain around Sheboygan has only modest variations in elevation — a maximum elevation change of 174 ft around an average of 614 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 295 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 761 ft.

The land around Sheboygan is covered by artificial surfaces (39%) and water (36%) within 2 miles, water (52%) and cropland (21%) within 10 miles, and water (54%) and cropland (23%) within 50 miles.

2 miles
174 ft
10 miles
295 ft
50 miles
761 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Manitowoc 24 mi · West Bend 32 mi · Fond du Lac 36 mi · Mequon 40 mi · Germantown 41 mi · Menomonee Falls 44 mi · Oshkosh 45 mi · Kaukauna 46 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 Sheboygan (43.7508°, -87.7145°, elevation 630 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).