Jasper weather in August

In August, Jasper sees average daytime highs of 85°F and overnight lows near 68°F, with 3.1 in of rain across 8.5 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 12th-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 40% 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 Jasper's 2nd-clearest and 12th-windiest month. For the whole year in context, see Jasper's year-round climate.

Daytime high
85°
2nd warmest
Overnight low
68°
11th coldest
Rainfall
3.1 in
8.5 wet days
Daylight
13 h 30 min
6:07 AM – 7:37 PM
Cloud cover
51%
2nd clearest
Wind
5 mph
12th windiest
Solar energy
5.72 kWh/m²
Travel score
5.4
out of 10

Jasper is city in Dubois County, Indiana, United States.

Density
452/km²
people per km²
Founded
1818

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 Jasper reaches about 85°F in the afternoon and slips back to 68°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 79°F and 92°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18669
28669
38669
48669
58669
68668
78668
88668
98668
108668
118568
128568
138568
148568
158568
168568
178568
188567
198567
208567
218567
228567
238567
248567
258567
268567
278567
288567
298566
308566
318566

How August really feels in Jasper

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.

Jasper 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
Jan40° / 26°3.69.22.79.60.0
Feb45° / 29°3.293.210.50.9
Mar55° / 38°4.411.11.511.73.5
Apr67° / 48°5.312.20.1135.7
May75° / 58°5.312.9014.16.3
Jun84° / 67°4.412014.65.4
Jul87° / 70°3.811.1014.44.8
Aug85° / 68°3.18.5013.55.4
Sep80° / 60°3.27.9012.36.9
Oct68° / 49°3.58.10116.6
Nov54° / 38°3.790.69.93.5
Dec44° / 31°3.810.12.49.40.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25842
35842
45842
55842
65842
75743
85743
95743
105644
115644
125644
135644
145743
155743
165743
175842
185842
195842
205842
215842
225941
235842
245842
255941
265842
275941
285941
296040
306040
316040

Chance of precipitation in August

Any precipitation

Jasper gets around 3.1 in of rain over 8.5 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 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
331
431
531
630
730
830
929
1029
1129
1229
1329
1429
1528
1628
1727
1827
1927
2026
2126
2226
2326
2426
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 56% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
13152131282
23152131272
33152131272
44152231262
54152231262
64152231262
74152231262
85152230262
95142230262
106142230263
116142229263
126142329263
136142328253
146152328253
156152428253
167152428243
177152428242
187142528242
197142528242
207142529242
217142529242
227142429242
237142430241
247142430231
257142431231
268152331221
278152332221
289152232210
2910152232200
3011162232190
3112162232180

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 5 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
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

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 5:53 AM to 6:20 AM, and sunset from 7:54 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:537:54
214.05:547:53
314.05:557:52
413.95:567:51
513.95:577:50
613.95:587:49
713.85:597:48
813.85:597:47
913.86:007:46
1013.76:017:44
1113.76:027:43
1213.66:037:42
1313.66:047:41
1413.66:057:40
1513.56:067:38
1613.56:077:37
1713.56:087:36
1813.46:097:34
1913.46:097:33
2013.46:107:31
2113.36:117:30
2213.36:127:29
2313.26:137:27
2413.26:147:26
2513.26:157:24
2613.16:167:23
2713.16:177:21
2813.06:187:20
2913.06:197:18
3013.06:197:17
3112.96:207:15

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.72 kWh/m².

For context, solar energy here swings from a low near 1.79 kWh/m² to a high of 6.35 kWh/m² in June across the year — August's 5.72 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
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
185.7Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.5Bright
245.5Bright
255.5Bright
265.4Bright
275.4Bright
285.4Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in August

Is August a good time to visit Jasper?

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

5.4
Sightseeing
5th-best month of the year
7.2
Beach & pool
1st-best month of the year

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

What to pack for Jasper in August

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

In August, Jasper sees daytime highs around 85°F and nights near 68°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Jasper 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 Jasper peaks around July 10 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 highHighModerateJul 10UV 9Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Jasper 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 Jasper is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1318 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar12Good
Apr12Good
May15Moderate
Jun17Moderate
Jul18Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Jasper?

Jasper sits at 38.4°N, 86.9°W, 466 ft above sea level, in United States. The nearest listed city is Vincennes, 38 mi away.

Topography around Jasper

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

Within 2 miles, the terrain around Jasper has only modest variations in elevation — a maximum elevation change of 194 ft around an average of 502 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 417 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 696 ft.

The land around Jasper is covered by trees (37%), grassland (26%) and artificial surfaces (20%) within 2 miles, cropland (43%) and trees (38%) within 10 miles, and trees (48%) and cropland (38%) within 50 miles.

2 miles
194 ft
10 miles
417 ft
50 miles
696 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Vincennes 38 mi · Owensboro 43 mi · Evansville 45 mi · Henderson 52 mi · Bloomington 58 mi · New Albany 60 mi · Pleasure Ridge Park 61 mi · Valley Station 61 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 Jasper (38.3914°, -86.9311°, elevation 466 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).