Franklin weather in August

In August, Franklin sees average daytime highs of 83°F and overnight lows near 65°F, with 2.8 in of rain across 9.2 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 11th-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 37% 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 Franklin's 2nd-clearest and 12th-windiest month. For the whole year in context, see Franklin's year-round climate.

Daytime high
83°
2nd warmest
Overnight low
65°
11th coldest
Rainfall
2.8 in
9.2 wet days
Daylight
13 h 36 min
6:01 AM – 7:35 PM
Cloud cover
53%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
5.7 kWh/m²
Travel score
6.0
out of 10

Franklin is city in Johnson County, Indiana, United States.

Density
730/km²
people per km²
Founded
1823

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 Franklin reaches about 83°F in the afternoon and slips back to 65°F overnight — a 18°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)
18466
28466
38466
48366
58366
68366
78366
88366
98366
108366
118365
128365
138365
148365
158365
168365
178365
188365
198365
208365
218365
228365
238365
248365
258365
268364
278364
288364
298264
308264
318263

How August really feels in Franklin

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.

Franklin weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 23°3.39.349.50.0
Feb41° / 25°2.78.63.810.40.2
Mar52° / 34°4.011.21.811.72.5
Apr64° / 45°4.812.10.3135.2
May73° / 55°4.913.3014.16.2
Jun81° / 64°4.311.8014.75.9
Jul84° / 67°3.511.5014.55.4
Aug83° / 65°2.89.2013.56.0
Sep78° / 58°3.07.9012.37.2
Oct65° / 46°3.38.70116.1
Nov52° / 36°3.590.89.82.7
Dec41° / 28°3.310.13.39.30.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
26040
36040
46040
56040
66040
75941
85842
95842
105842
115743
125743
135743
145842
155743
165743
175842
185842
195842
205842
215842
225842
235842
245743
255743
265743
275842
285842
295842
305941
315941

Chance of precipitation in August

Any precipitation

Franklin gets around 2.8 in of rain over 9.2 wet days in August. 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 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
234
333
433
532
631
731
831
931
1030
1130
1230
1330
1430
1529
1629
1729
1828
1928
2028
2128
2228
2328
2428
2528
2628
2728
2828
2928
3028
3128

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 44% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
17212427210
27212427210
37212427200
47222427201
58222427191
68222427191
78222327181
89222327181
99222327181
109222327181
1110222227171
1210232227171
1310232227171
1410232327161
1510232327162
1610222328151
1710222427151
1810222428141
1911222528141
2011212528141
2111212528141
2211202528141
2312202528141
2412202528141
2513202528141
2614192528130
2715192528130
2816192527120
2917192427120
3018192426120
3120202426110

Wind in August

Winds average 6 mph in August, the calmest month.

Across August, daily wind ranges from about 5 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
25calm
35calm
45calm
55calm
65calm
75calm
85calm
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 5:47 AM to 6:16 AM, and sunset from 7:53 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:477:53
214.15:487:52
314.05:497:51
414.05:507:50
514.05:517:49
613.95:527:48
713.95:537:47
813.95:547:45
913.85:557:44
1013.85:567:43
1113.85:577:42
1213.75:587:41
1313.75:597:39
1413.66:007:38
1513.66:007:37
1613.66:017:35
1713.56:027:34
1813.56:037:32
1913.46:047:31
2013.46:057:30
2113.46:067:28
2213.36:077:27
2313.36:087:25
2413.26:097:24
2513.26:107:22
2613.26:117:21
2713.16:127:19
2813.16:137:18
2913.06:147:16
3013.06:157:14
3113.06:167:13

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.7 kWh/m².

For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 6.27 kWh/m² in July across the year — August's 5.7 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.0Bright
56.0Bright
65.9Bright
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
215.5Bright
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 Franklin?

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

6.0
Sightseeing
4th-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for Franklin in August

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

In August, Franklin 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 Franklin 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 Franklin peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Franklin 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 Franklin 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1416 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar12Moderate
Apr12Good
May14Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Franklin?

Franklin sits at 39.5°N, 86.1°W, 725 ft above sea level, in United States. The nearest listed city is Greenwood, 9.3 mi away.

Topography around Franklin

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

Within 2 miles, the terrain around Franklin has only modest variations in elevation — a maximum elevation change of 95 ft around an average of 738 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 371 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 758 ft.

The land around Franklin is covered by cropland (31%), grassland (28%) and trees (21%) within 2 miles, cropland (57%) and trees (21%) within 10 miles, and cropland (47%) and trees (39%) within 50 miles.

2 miles
95 ft
10 miles
371 ft
50 miles
758 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Greenwood 9.3 mi · Shelbyville 15 mi · Columbus 21 mi · Indianapolis 21 mi · Plainfield 24 mi · Lawrence 25 mi · Greenfield 26 mi · Avon 27 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 Franklin (39.4806°, -86.055°, elevation 725 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).