Shelbyville weather in September

In September, Shelbyville sees average daytime highs of 78°F and overnight lows near 58°F, with 2.9 in of rain across 7.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 73°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 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Shelbyville's 1st-clearest and 10th-windiest month. For the whole year in context, see Shelbyville's year-round climate.

Daytime high
78°
4th warmest
Overnight low
58°
9th coldest
Rainfall
2.9 in
7.6 wet days
Daylight
12 h 18 min
6:30 AM – 6:45 PM
Cloud cover
49%
1st clearest
Wind
7 mph
10th windiest
Solar energy
4.61 kWh/m²
Travel score
7.2
out of 10

Shelbyville is city in Indiana, United States.

Density
634/km²
people per km²
Founded
1822

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 81°F in the first days to 73°F by the end.

A typical September day in Shelbyville reaches about 78°F in the afternoon and slips back to 58°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 87°F. Set against its neighbours, September runs about 5°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18263
28263
38162
48162
58162
68162
78061
88061
98060
107960
117960
127959
137859
147858
157858
167858
177757
187757
197656
207656
217655
227555
237555
247554
257454
267454
277453
287353
297352
307352

How September really feels in Shelbyville

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.

Shelbyville weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 23°3.39.54.19.50.0
Feb41° / 25°2.88.7410.40.2
Mar51° / 34°4.111.11.711.72.5
Apr64° / 45°4.712.20.4135.2
May73° / 55°4.812.9014.16.2
Jun81° / 64°4.211.6014.76.0
Jul84° / 67°3.511.4014.55.5
Aug83° / 65°2.78.8013.66.2
Sep78° / 58°2.97.6012.37.2
Oct65° / 46°3.28.9010.96.0
Nov52° / 36°3.59.20.99.82.8
Dec41° / 28°3.410.33.39.30.2

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 41%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55842
65941
75941
85941
95941
105941
115941
125941
135842
145842
155842
165842
175842
185842
195842
205941
215941
225941
235941
245941
255941
265941
276040
285941
295941
305941

Chance of precipitation in September

Any precipitation

Shelbyville gets around 2.9 in of rain over 7.6 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 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
225
325
424
524
624
724
823
923
1023
1123
1223
1324
1424
1525
1625
1726
1826
1927
2027
2127
2228
2328
2428
2528
2628
2728
2828
2928
3027

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12220232610
2242022259
3252022248
4272122238
5292121227
6302221216
7322220205
8342220194
9352320184
10372320183
11382319172
12402319162
13412318162
14432318151
15452317151
16472216141
17492216131
18502115131
19532015120
20552014110
21571913110
22591813100
2361181290
2462171290
2564171180
2665161180
2766161170
2867161070
2968151070
3069151060

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 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 78 minutes over September. Sunrise moves from 6:16 AM to 6:43 AM, and sunset from 7:10 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:167:10
212.96:167:08
312.86:177:07
412.86:187:05
512.76:197:04
612.76:207:02
712.76:217:00
812.66:226:59
912.66:236:57
1012.56:246:55
1112.56:256:54
1212.46:266:52
1312.46:276:50
1412.36:286:48
1512.36:296:47
1612.36:306:45
1712.26:316:43
1812.26:326:42
1912.16:336:40
2012.16:346:38
2112.06:356:37
2212.06:366:35
2311.96:376:33
2411.96:376:31
2511.96:386:30
2611.86:396:28
2711.86:406:26
2811.76:416:25
2911.76:426:23
3011.66:436:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.61 kWh/m².

For context, solar energy here swings from a low near 1.75 kWh/m² to a high of 6.27 kWh/m² in July across the year — September's 4.61 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.5Bright
204.4Bright
214.4Bright
224.4Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Is September a good time to visit Shelbyville?

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

7.2
Sightseeing
1st-best month of the year
6.5
Beach & pool
3rd-best month of the year

September is one of the better times to visit Shelbyville for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Shelbyville in September

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

In September, Shelbyville sees daytime highs around 78°F and nights near 58°F. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Shelbyville 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 Shelbyville peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 21UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Shelbyville 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 Shelbyville is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar12Good
Apr12Good
May14Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Shelbyville?

Shelbyville sits at 39.5°N, 85.8°W, 764 ft above sea level, in United States. The nearest listed city is Franklin, 15 mi away.

Topography around Shelbyville

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

Within 2 miles, the terrain around Shelbyville has only modest variations in elevation — a maximum elevation change of 79 ft around an average of 771 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 279 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 833 ft.

The land around Shelbyville is covered by cropland (29%), artificial surfaces (24%) and trees (22%) within 2 miles, cropland (78%) within 10 miles, and cropland (50%) and trees (36%) within 50 miles.

2 miles
79 ft
10 miles
279 ft
50 miles
833 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Franklin 15 mi · Greenfield 18 mi · Greenwood 19 mi · Columbus 24 mi · Lawrence 25 mi · Indianapolis 27 mi · Broad Ripple 30 mi · Fishers 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 Shelbyville (39.5214°, -85.7769°, elevation 764 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. 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).