Manitowoc weather in September

In September, Manitowoc sees average daytime highs of 69°F and overnight lows near 56°F, with 2.8 in of rain across 9.4 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 36% 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 Manitowoc's 2nd-clearest and 8th-windiest month. For the whole year in context, see Manitowoc's year-round climate.

Daytime high
69°
4th warmest
Overnight low
56°
9th coldest
Rainfall
2.8 in
9.4 wet days
Daylight
12 h 18 min
5:36 AM – 5:54 PM
Cloud cover
55%
2nd clearest
Wind
9 mph
8th windiest
Solar energy
4.27 kWh/m²
Travel score
6.5
out of 10

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

Density
701/km²
people per km²

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 Manitowoc reaches about 69°F in the afternoon and slips back to 56°F overnight — a 13°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)
17461
27461
37361
47360
57360
67260
77259
87259
97159
107158
117158
127058
137057
147057
156956
166956
176956
186855
196855
206755
216754
226754
236653
246653
256553
266552
276452
286451
296451
306351

How September really feels in Manitowoc

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.

Manitowoc 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
Jan27° / 15°1.67.96.79.10.0
Feb29° / 16°1.46.65.610.20.0
Mar38° / 25°2.294.811.60.1
Apr49° / 36°3.411.22.713.21.9
May60° / 47°3.310.4014.54.7
Jun72° / 59°3.410.6015.26.5
Jul78° / 65°3.510.70156.8
Aug76° / 64°3.510.3013.86.9
Sep69° / 56°2.89.4012.36.5
Oct56° / 45°2.99.70.210.83.9
Nov44° / 34°2.18.529.40.8
Dec33° / 23°1.87.35.28.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45644
55743
65644
75644
85644
95545
105446
115446
125347
135446
145347
155248
165248
175248
185149
195149
205050
215149
225149
235050
245050
255050
264951
274951
284951
294951
304951

Chance of precipitation in September

Any precipitation

Manitowoc gets around 2.8 in of rain over 9.4 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 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
429
529
629
729
829
930
1030
1131
1231
1332
1432
1532
1633
1733
1833
1933
2033
2133
2233
2333
2433
2534
2633
2733
2833
2933
3032

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1232425243
2252525233
3272524223
4282523213
5302523203
6322522192
7342422182
8352421172
9372421171
10382421161
11402420151
12422420141
13432420131
14452419121
15462319111
16482319100
1750231890
1853221780
1954221680
2056221570
2159211460
2261201360
2363201250
2466191140
2567181140
2669171040
277216930
287415830
297514830
307813720

Wind in September

Winds average 9 mph in September.

Across September, daily wind ranges from about 8 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light 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
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light 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 5:18 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)
113.15:186:22
213.05:196:21
313.05:216:19
412.95:226:17
512.95:236:15
612.85:246:13
712.85:256:11
812.75:276:09
912.75:286:07
1012.65:296:05
1112.65:306:04
1212.55:316:02
1312.55:326:00
1412.45:345:58
1512.45:355:56
1612.35:365:54
1712.25:375:52
1812.25:385:50
1912.15:405:48
2012.15:415:46
2112.05:425:44
2212.05:435:42
2311.95:445:40
2411.95:465:38
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 4.27 kWh/m².

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 6.51 kWh/m² in June across the year — September's 4.27 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
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Manitowoc?

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
3.7
Beach & pool
4th-best month of the year

September is a reasonable time to visit Manitowoc for sightseeing.

What to pack for Manitowoc in September

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

In September, Manitowoc sees daytime highs around 69°F and nights near 56°F. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Manitowoc 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 offshore is warmest in August at about 69°F and coldest in March near 36°F.

It's comfortable for a long swim from Aug 10 to Aug 23 — about 0.5 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
Dec40Bracing

UV index in Manitowoc 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 Manitowoc 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
Feb2Moderate
Mar4Moderate
Apr5High
May8Very high
Jun9Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Manitowoc?

Manitowoc sits at 44.1°N, 87.7°W, 604 ft above sea level, in United States. The nearest listed city is Sheboygan, 24 mi away.

Topography around Manitowoc

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

Within 2 miles, the terrain around Manitowoc has only modest variations in elevation — a maximum elevation change of 125 ft around an average of 607 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 394 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 774 ft.

The land around Manitowoc is covered by water (40%) and artificial surfaces (33%) within 2 miles, water (41%) and cropland (25%) within 10 miles, and water (53%) and cropland (24%) within 50 miles.

2 miles
125 ft
10 miles
394 ft
50 miles
774 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sheboygan 24 mi · Bellevue 28 mi · De Pere 32 mi · Kaukauna 33 mi · Ashwaubenon 34 mi · Green Bay 35 mi · Howard 38 mi · Appleton 39 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 Manitowoc (44.0886°, -87.6576°, elevation 604 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).