West Lafayette weather in August

In August, West Lafayette sees average daytime highs of 82°F and overnight lows near 64°F, with 3.2 in of rain across 9.8 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 82°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 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is West Lafayette's 2nd-clearest and 12th-windiest month. For the whole year in context, see West Lafayette's year-round climate.

Daytime high
82°
2nd warmest
Overnight low
64°
11th coldest
Rainfall
3.2 in
9.8 wet days
Daylight
13 h 36 min
6:03 AM – 7:40 PM
Cloud cover
54%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
5.58 kWh/m²
Travel score
6.5
out of 10

West Lafayette is city in Indiana, USA.

Density
1,273/km²
people per km²
Founded
1888

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 82°F through the month.

A typical August day in West Lafayette reaches about 82°F in the afternoon and slips back to 64°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 89°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)
18365
28365
38265
48265
58265
68265
78265
88265
98265
108265
118264
128264
138264
148264
158264
168264
178264
188264
198264
208264
218264
228264
238264
248264
258263
268263
278263
288263
298163
308162
318162

How August really feels in West Lafayette

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.

West Lafayette weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan34° / 20°2.79.14.99.40.0
Feb39° / 23°2.38.14.210.40.1
Mar50° / 32°3.310.42.411.72.2
Apr62° / 43°4.311.70.4135.0
May72° / 54°4.313.3014.26.1
Jun80° / 63°4.312.8014.86.0
Jul83° / 66°3.611.2014.65.7
Aug82° / 64°3.29.8013.66.5
Sep77° / 56°2.78.1012.37.1
Oct64° / 45°3.190.110.95.9
Nov50° / 35°3.18.51.29.82.4
Dec39° / 26°2.59.23.79.20.1

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 18% of August, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25743
35644
45644
55644
65644
75644
85644
95644
105545
115545
125545
135545
145545
155545
165644
175644
185644
195545
205545
215545
225545
235545
245545
255545
265644
275644
285644
295743
305743
315842

Chance of precipitation in August

Any precipitation

West Lafayette gets around 3.2 in of rain over 9.8 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 31% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
333
433
533
632
732
832
932
1032
1132
1232
1332
1432
1532
1632
1731
1831
1931
2031
2130
2230
2330
2430
2530
2630
2729
2829
2929
3029
3129

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 26% of days. Sticky, muggy-or-worse air turns up on roughly 41% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
17222527191
27222527181
38222527181
48222527171
58232526171
68232526171
79232526161
89232526161
910232425161
1010232425161
1111232425161
1211232425161
1311232425161
1411232424161
1511242424151
1611242425151
1711242425151
1811232525151
1911232526151
2012232526141
2112222526141
2212222527141
2312222527141
2413222427130
2513222427130
2614222427120
2715222327120
2816232327110
2917232327110
3018232226100
312023222690

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 7 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
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 12 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 72 minutes over August. Sunrise moves from 5:49 AM to 6:18 AM, and sunset from 7:59 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:497:59
214.15:497:58
314.15:507:57
414.15:517:56
514.05:527:54
614.05:537:53
714.05:547:52
813.95:557:51
913.95:567:50
1013.95:577:48
1113.85:587:47
1213.85:597:46
1313.76:007:44
1413.76:017:43
1513.76:027:42
1613.66:037:40
1713.66:047:39
1813.56:057:37
1913.56:067:36
2013.56:077:34
2113.46:087:33
2213.46:097:31
2313.36:107:30
2413.36:117:28
2513.26:127:27
2613.26:137:25
2713.26:147:24
2813.16:157:22
2913.16:167:20
3013.06:177:19
3113.06:187:17

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.58 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 6.32 kWh/m² in June across the year — August's 5.58 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
36.0Bright
45.9Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.3Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.2Bright
315.1Bright
Planning a trip in August

Is August a good time to visit West Lafayette?

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

6.5
Sightseeing
2nd-best month of the year
6.9
Beach & pool
1st-best month of the year

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

What to pack for West Lafayette in August

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

In August, West Lafayette sees daytime highs around 82°F and nights near 64°F. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in West Lafayette 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 West Lafayette peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in West Lafayette 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 West Lafayette is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1516 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar13Moderate
Apr12Good
May13Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov8Good
Dec9Good
Location & terrain

Where is West Lafayette?

West Lafayette sits at 40.4°N, 86.9°W, 610 ft above sea level, in United States. The nearest listed city is Lafayette, 1.9 mi away.

Topography around West Lafayette

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

Within 2 miles, the terrain around West Lafayette has only modest variations in elevation — a maximum elevation change of 269 ft around an average of 620 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 312 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 627 ft.

The land around West Lafayette is covered by trees (40%) and artificial surfaces (36%) within 2 miles, cropland (50%) and trees (27%) within 10 miles, and cropland (78%) within 50 miles.

2 miles
269 ft
10 miles
312 ft
50 miles
627 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Lafayette 1.9 mi · Frankfort 23 mi · Crawfordsville 27 mi · Lebanon 35 mi · Logansport 37 mi · Kokomo 41 mi · Danville 43 mi · Zionsville 47 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 West Lafayette (40.4259°, -86.9081°, elevation 610 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).