Shelby weather in September

In September, Shelby sees average daytime highs of 72°F and overnight lows near 54°F, with 2.8 in of rain across 9.1 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 67°F by the end. The sky is clear or mostly clear about 34% 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 Shelby's 1st-clearest and 9th-windiest month. For the whole year in context, see Shelby's year-round climate.

Daytime high
72°
4th warmest
Overnight low
54°
9th coldest
Rainfall
2.8 in
9.1 wet days
Daylight
12 h 18 min
6:18 AM – 6:35 PM
Cloud cover
55%
1st clearest
Wind
7 mph
9th windiest
Solar energy
4.28 kWh/m²
Travel score
6.8
out of 10

Shelby is charter township and census-designated place in Macomb County, Michigan.

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 76°F in the first days to 67°F by the end.

A typical September day in Shelby reaches about 72°F in the afternoon and slips back to 54°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 62°F and 82°F. Set against its neighbours, September runs about 7°F cooler than August and about 13°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17760
27759
37659
47659
57658
67658
77558
87557
97457
107456
117456
127356
137355
147355
157255
167254
177254
187153
197153
207153
217052
227052
236951
246951
256851
266850
276750
286750
296749
306649

How September really feels in Shelby

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.

Shelby weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 18°2.39.36.49.20.0
Feb34° / 20°2.08.16.210.30.0
Mar44° / 27°2.39.84.111.60.8
Apr56° / 38°3.511.81.613.13.6
May67° / 49°3.712.20.114.45.8
Jun77° / 59°3.710.9015.16.6
Jul81° / 63°3.111014.86.4
Aug79° / 62°3.010.4013.76.6
Sep72° / 54°2.89.1012.36.8
Oct59° / 44°2.89.80.210.84.6
Nov46° / 34°2.692.29.61.3
Dec36° / 25°2.29.258.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35743
45743
55743
65644
75644
85644
95644
105545
115545
125446
135446
145347
155347
165347
175248
185248
195248
205149
215149
225149
235050
245050
254951
264951
274951
284951
294951
304951

Chance of precipitation in September

Any precipitation

Shelby gets around 2.8 in of rain over 9.1 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 30% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
230
330
430
530
630
730
830
930
1030
1130
1230
1330
1430
1530
1629
1729
1829
1929
2029
2130
2230
2331
2431
2532
2632
2732
2833
2932
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 54% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1302722193
2322721183
3332720172
4352720162
5372719152
6392718142
7402717142
8422617132
9442616121
10452616121
11472516111
12482515111
13502415101
14512315101
1553231590
1655221490
1757211480
1858211380
1960201370
2061201270
2164191160
2265181160
2367181050
246917950
257017940
267216840
277216840
287515730
297515730
307714630

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227light breeze
237light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

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 6:01 AM to 6:34 AM, and sunset from 7:02 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:017:02
213.06:027:01
312.96:046:59
412.96:056:57
512.86:066:55
612.86:076:53
712.76:086:52
812.76:096:50
912.66:106:48
1012.66:116:46
1112.56:126:44
1212.56:136:42
1312.46:156:41
1412.46:166:39
1512.36:176:37
1612.36:186:35
1712.26:196:33
1812.26:206:31
1912.16:216:29
2012.16:226:28
2112.06:236:26
2212.06:256:24
2311.96:266:22
2411.96:276:20
2511.86:286:18
2611.86:296:16
2711.76:306:15
2811.76:316:13
2911.66:336:11
3011.66:346:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.28 kWh/m².

For context, solar energy here swings from a low near 1.39 kWh/m² to a high of 6.34 kWh/m² in June across the year — September's 4.28 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.0Bright
224.0Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Shelby?

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

6.8
Sightseeing
1st-best month of the year
4.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Shelby for sightseeing.

What to pack for Shelby in September

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

In September, Shelby sees daytime highs around 72°F and nights near 54°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Shelby in September

The nearest coast averages about 68°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 9 mi away) is warmest in August at about 73°F and coldest in February near 33°F.

It's comfortable for a long swim from Jul 2 to Sep 15 — about 2.5 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan34Bracing
Feb33Bracing
Mar34Bracing
Apr41Bracing
May52Bracing
Jun64Cool
Jul72Refreshing
Aug73Refreshing
Sep68Refreshing
Oct57Bracing
Nov47Bracing
Dec39Bracing

UV index in Shelby 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 Shelby peaks around June 20 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 9Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun9Very high
Jul8Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Shelby 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 Shelby is worst in July — around 15 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1415 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar14Moderate
Apr13Moderate
May15Moderate
Jun15Moderate
Jul15Moderate
Aug15Moderate
Sep12Moderate
Oct8Good
Nov9Good
Dec9Good
Location & terrain

Where is Shelby?

Shelby sits at 42.7°N, 83.0°W, 679 ft above sea level, in United States. The nearest listed city is Rochester Hills, 6.2 mi away.

Topography around Shelby

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

Within 2 miles, the terrain around Shelby has only modest variations in elevation — a maximum elevation change of 148 ft around an average of 679 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 538 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 915 ft.

The land around Shelby is covered by trees (44%), grassland (26%) and artificial surfaces (26%) within 2 miles, trees (40%), artificial surfaces (26%) and grassland (25%) within 10 miles, and trees (34%) and cropland (32%) within 50 miles.

2 miles
148 ft
10 miles
538 ft
50 miles
915 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Rochester Hills 6.2 mi · Sterling Heights 6.2 mi · Troy 7.5 mi · Clinton Township 8.1 mi · Mount Clemens 9.3 mi · Auburn Hills 11 mi · Birmingham 12 mi · Warren 12 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 Shelby (42.6709°, -83.033°, elevation 679 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).