Vincennes weather in August

In August, Vincennes sees average daytime highs of 85°F and overnight lows near 67°F, with 2.9 in of rain across 8.6 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 85°F through the month. The sky is clear or mostly clear about 41% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Vincennes's 2nd-clearest and 12th-windiest month. For the whole year in context, see Vincennes's year-round climate.

Daytime high
85°
2nd warmest
Overnight low
67°
11th coldest
Rainfall
2.9 in
8.6 wet days
Daylight
13 h 30 min
5:09 AM – 6:40 PM
Cloud cover
50%
2nd clearest
Wind
5 mph
12th windiest
Solar energy
5.77 kWh/m²
Travel score
5.5
out of 10

Vincennes is county seat of Knox County, Indiana, United States.

Density
930/km²
people per km²
Founded
1732

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 85°F through the month.

A typical August day in Vincennes reaches about 85°F in the afternoon and slips back to 67°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 92°F. Set against its neighbours, August runs about 1°F cooler than July and about 6°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18669
28668
38668
48568
58568
68568
78568
88568
98568
108568
118568
128567
138567
148567
158567
168567
178567
188567
198567
208567
218567
228567
238567
248567
258567
268567
278566
288566
298466
308466
318465

How August really feels in Vincennes

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.

Vincennes 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
Jan40° / 25°3.69.12.89.60.0
Feb44° / 28°3.08.4310.50.7
Mar54° / 37°4.110.61.311.73.3
Apr66° / 47°5.2120135.7
May75° / 58°5.112.9014.16.3
Jun84° / 67°4.111.2014.75.5
Jul86° / 70°3.811014.44.9
Aug85° / 67°2.98.6013.55.5
Sep79° / 60°2.97.4012.37.1
Oct67° / 48°3.280116.6
Nov54° / 37°3.88.80.69.93.3
Dec43° / 29°3.49.62.59.30.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% 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 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
36040
46040
56040
66139
76040
86040
96040
106040
116040
126040
136040
146040
156040
166040
176040
186040
196040
206040
216040
226040
236040
245941
256040
266040
276139
286139
296139
306238
316337

Chance of precipitation in August

Any precipitation

Vincennes gets around 2.9 in of rain over 8.6 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 28% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
331
431
530
630
730
829
929
1029
1129
1229
1329
1429
1528
1628
1727
1827
1927
2027
2127
2227
2327
2427
2526
2626
2726
2826
2926
3026
3126

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 30% of days. Sticky, muggy-or-worse air turns up on roughly 55% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
14152230282
24152230272
34162231262
44162231252
54162232252
64162232252
74162132242
85162132242
95162132242
105162132242
116162131242
126172131232
136172130232
146172130232
156172230232
166172229232
176172229232
186172229232
196172329232
207172329232
217172229241
227172229241
237172229241
247172229241
258172230231
268172130230
279172130220
289182131210
2910182031200
3011192031190
3112192031180

Wind in August

Winds average 5 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
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 hours at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 4:55 AM to 5:22 AM, and sunset from 6:57 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:556:57
214.04:566:56
314.04:576:55
413.94:586:54
513.94:596:53
613.94:596:52
713.85:006:51
813.85:016:50
913.85:026:49
1013.75:036:47
1113.75:046:46
1213.75:056:45
1313.65:066:44
1413.65:076:42
1513.65:086:41
1613.55:096:40
1713.55:106:38
1813.45:106:37
1913.45:116:36
2013.45:126:34
2113.35:136:33
2213.35:146:31
2313.25:156:30
2413.25:166:29
2513.25:176:27
2613.15:186:26
2713.15:196:24
2813.05:206:23
2913.05:216:21
3013.05:226:19
3112.95:226:18

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.77 kWh/m².

For context, solar energy here swings from a low near 1.81 kWh/m² to a high of 6.43 kWh/m² in June across the year — August's 5.77 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.0Intense
66.0Intense
76.0Bright
86.0Bright
95.9Bright
105.9Bright
115.9Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.6Bright
225.6Bright
235.6Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.4Bright
295.4Bright
305.3Bright
315.3Bright
Planning a trip in August

Hazard calendar for Vincennes

In seasonPeak

In August, Vincennes sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Vincennes sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Vincennes?

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

5.5
Sightseeing
5th-best month of the year
7.3
Beach & pool
1st-best month of the year

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

What to pack for Vincennes in August

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

In August, Vincennes sees daytime highs around 85°F and nights near 67°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Vincennes in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Vincennes 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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Vincennes 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 Vincennes 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJul 1417 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar12Good
Apr11Good
May14Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Vincennes?

Vincennes sits at 38.7°N, 87.5°W, 420 ft above sea level, in United States. The nearest listed city is Jasper, 38 mi away.

Topography around Vincennes

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

Within 2 miles, the terrain around Vincennes has only modest variations in elevation — a maximum elevation change of 194 ft around an average of 430 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 279 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 594 ft.

The land around Vincennes is covered by trees (27%), cropland (26%) and artificial surfaces (24%) within 2 miles, cropland (70%) and trees (20%) within 10 miles, and cropland (57%) and trees (34%) within 50 miles.

2 miles
194 ft
10 miles
279 ft
50 miles
594 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Jasper 38 mi · Evansville 48 mi · Terre Haute 55 mi · Henderson 58 mi · Bloomington 63 mi · Owensboro 66 mi · Charleston 66 mi · Mattoon 71 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 Vincennes (38.6773°, -87.5286°, elevation 420 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).