Mount Pleasant weather in September

In September, Mount Pleasant sees average daytime highs of 69°F and overnight lows near 63°F, with 3.2 in of rain across 9.6 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 74°F in the first days to 65°F by the end. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Mount Pleasant's 1st-clearest and 8th-windiest month. For the whole year in context, see Mount Pleasant's year-round climate.

Daytime high
69°
3rd warmest
Overnight low
63°
10th coldest
Rainfall
3.2 in
9.6 wet days
Daylight
12 h 18 min
5:37 AM – 5:54 PM
Cloud cover
50%
1st clearest
Wind
13 mph
8th windiest
Solar energy
4.36 kWh/m²
Travel score
6.6
out of 10

Mount Pleasant is village in Racine County, Wisconsin, in the United States.

Density
287/km²
people per km²
Founded
1835

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 74°F in the first days to 65°F by the end.

A typical September day in Mount Pleasant reaches about 69°F in the afternoon and slips back to 63°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 62°F and 76°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17468
27468
37468
47367
57367
67367
77366
87266
97266
107265
117165
127165
137164
147064
157064
166963
176963
186962
196862
206862
216761
226761
236760
246660
256660
266559
276559
286558
296458
306458

How September really feels in Mount Pleasant

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.

Mount Pleasant weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan30° / 21°2.59.67.39.20.0
Feb30° / 21°2.17.45.610.30.0
Mar36° / 28°2.69.43.511.60.0
Apr44° / 37°4.411.81.713.10.6
May54° / 48°3.510.6014.43.3
Jun68° / 62°3.110015.16.2
Jul76° / 70°2.99.8014.87.1
Aug76° / 70°3.710.7013.77.0
Sep69° / 63°3.29.6012.36.6
Oct57° / 51°3.610.30.110.84.2
Nov45° / 39°3.19.81.39.61.0
Dec36° / 29°2.79.55.18.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26238
36337
46337
56337
66337
76337
86238
96139
106139
116139
126040
136040
145941
155941
165842
175842
185743
195743
205743
215545
225545
235545
245446
255446
265446
275347
285347
295347
305347

Chance of precipitation in September

Any precipitation

Mount Pleasant gets around 3.2 in of rain over 9.6 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 (%)
132
231
331
431
531
631
731
831
931
1031
1132
1232
1332
1433
1533
1633
1733
1833
1933
2033
2133
2233
2334
2434
2534
2634
2734
2834
2933
3033

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11523252711
21623252610
3182324259
4192324249
5212424238
6222424237
7242424226
8262424216
9272424205
10292324194
11302324184
12322324173
13332324173
14352324163
15362324152
16382324142
17392323132
18412422121
19432422111
20452421101
2147242091
2249241980
2352231870
2454231760
2555231660
2658221550
2759221450
2861211350
2963211240
3065201140

Wind in September

Winds average 13 mph in September.

Across September, daily wind ranges from about 12 mph on the calmest days to 14 mph at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (mph)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012breezy
1113breezy
1213breezy
1313breezy
1413breezy
1513breezy
1613breezy
1713breezy
1813breezy
1913breezy
2013breezy
2113breezy
2213breezy
2313breezy
2413breezy
2514breezy
2614breezy
2714breezy
2814breezy
2914breezy
3014breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:21 AM to 5:53 AM, and sunset from 6:22 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:216:22
213.05:226:20
312.95:236:18
412.95:246:16
512.85:256:15
612.85:266:13
712.75:276:11
812.75:286:09
912.65:296:07
1012.65:316:05
1112.55:326:04
1212.55:336:02
1312.45:346:00
1412.45:355:58
1512.35:365:56
1612.35:375:54
1712.25:385:52
1812.25:395:51
1912.15:415:49
2012.15:425:47
2112.05:435:45
2212.05:445:43
2311.95:455:41
2411.95:465:39
2511.85:475:38
2611.85:485:36
2711.75:505:34
2811.75:515:32
2911.65:525:30
3011.65:535:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.36 kWh/m².

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 6.5 kWh/m² in June across the year — September's 4.36 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Mount Pleasant?

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

6.6
Sightseeing
3rd-best month of the year
3.9
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Mount Pleasant for sightseeing.

What to pack for Mount Pleasant in September

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

In September, Mount Pleasant sees daytime highs around 69°F and nights near 63°F. Worth packing: rain gear and a windbreaker. About 10 days see rain.

rain geara windbreaker

Sea temperature near Mount Pleasant in September

The nearest coast averages about 67°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 71°F and coldest in March near 36°F.

It's comfortable for a long swim from Jul 20 to Sep 5 — about 1.6 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May43Bracing
Jun55Bracing
Jul68Cool
Aug71Refreshing
Sep67Cool
Oct56Bracing
Nov47Bracing
Dec42Bracing

UV index in Mount Pleasant in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mount Pleasant peaks around June 22 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 22UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Mount Pleasant 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 Mount Pleasant is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1017 µg/m³Oct 249 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr15Moderate
May16Moderate
Jun17Moderate
Jul17Moderate
Aug16Moderate
Sep13Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Mount Pleasant?

Mount Pleasant sits at 42.7°N, 87.9°W, 715 ft above sea level, in United States. The nearest listed city is Racine, 4.3 mi away.

Topography around Mount Pleasant

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

Within 2 miles, the terrain around Mount Pleasant has only modest variations in elevation — a maximum elevation change of 180 ft around an average of 689 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 394 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 840 ft.

The land around Mount Pleasant is covered by artificial surfaces (38%), trees (25%) and grassland (22%) within 2 miles, water (32%) and cropland (25%) within 10 miles, and water (49%) within 50 miles.

2 miles
180 ft
10 miles
394 ft
50 miles
840 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Racine 4.3 mi · Kenosha 8.1 mi · Caledonia 8.1 mi · Pleasant Prairie 11 mi · Oak Creek 13 mi · South Milwaukee 15 mi · Franklin 16 mi · Zion 17 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 Mount Pleasant (42.6974°, -87.8558°, elevation 715 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).