Shelbyville weather in August

In August, Shelbyville sees average daytime highs of 83°F and overnight lows near 65°F, with 2.7 in of rain across 8.8 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 83°F through the month. The sky is clear or mostly clear about 38% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Shelbyville's 2nd-clearest and 12th-windiest month. For the whole year in context, see Shelbyville's year-round climate.

Daytime high
83°
2nd warmest
Overnight low
65°
11th coldest
Rainfall
2.7 in
8.8 wet days
Daylight
13 h 36 min
6:00 AM – 7:34 PM
Cloud cover
53%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
5.71 kWh/m²
Travel score
6.2
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 August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 83°F through the month.

A typical August day in Shelbyville reaches about 83°F in the afternoon and slips back to 65°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 90°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18366
28366
38366
48366
58366
68366
78366
88366
98365
108365
118365
128365
138365
148365
158265
168265
178265
188265
198265
208365
218365
228365
238365
248365
258264
268264
278264
288264
298264
308264
318263

How August really feels in Shelbyville

Once humidity and wind are folded in, August 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

August 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 August compares with the rest of the year at a glance. August is the 2nd-warmest and 12th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
35842
45842
55842
65941
75842
85842
95842
105743
115644
125644
135743
145743
155743
165743
175842
185842
195842
205842
215842
225743
235743
245743
255743
265743
275743
285842
295842
305842
315842

Chance of precipitation in August

Any precipitation

Shelbyville gets around 2.7 in of rain over 8.8 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 34% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
134
233
332
432
531
631
730
830
929
1029
1129
1229
1329
1428
1528
1628
1727
1827
1927
2027
2127
2227
2327
2427
2527
2627
2726
2826
2926
3026
3125

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 43% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
16212527200
26222527200
37222527200
47222427190
57232427191
68232426181
78232426181
88232426181
99232426181
109232326171
119232326171
1210232326171
1310232326161
1410232326161
1510232327151
1610232427151
1711232427141
1811232428141
1911222428131
2011222528131
2111222529131
2211222529131
2312212529131
2412212429130
2513202430120
2614202429120
2716202429120
2817192428120
2918192428110
3019192327110
3121192326100

Wind in August

Winds average 6 mph in August, the calmest month.

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

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 5:46 AM to 6:15 AM, and sunset from 7:52 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:467:52
214.15:477:51
314.05:487:50
414.05:497:49
514.05:507:48
613.95:517:47
713.95:527:46
813.95:537:44
913.85:547:43
1013.85:557:42
1113.85:557:41
1213.75:567:39
1313.75:577:38
1413.65:587:37
1513.65:597:36
1613.66:007:34
1713.56:017:33
1813.56:027:31
1913.46:037:30
2013.46:047:29
2113.46:057:27
2213.36:067:26
2313.36:077:24
2413.26:087:23
2513.26:097:21
2613.26:107:20
2713.16:117:18
2813.16:127:16
2913.06:137:15
3013.06:147:13
3113.06:157:12

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.71 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 — August's 5.71 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.0Intense
56.0Bright
66.0Bright
75.9Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.5Bright
235.5Bright
245.5Bright
255.4Bright
265.4Bright
275.3Bright
285.3Bright
295.3Bright
305.2Bright
315.2Bright
Planning a trip in August

Is August a good time to visit Shelbyville?

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

6.2
Sightseeing
2nd-best month of the year
7.1
Beach & pool
1st-best month of the year

August is a reasonable time to visit Shelbyville for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Shelbyville in August

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

In August, Shelbyville sees daytime highs around 83°F and nights near 65°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Shelbyville in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — 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 August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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
August 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).