Valparaiso weather in August

In August, Valparaiso sees average daytime highs of 80°F and overnight lows near 64°F, with 3.9 in of rain across 11.1 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 80°F through the month. The sky is clear or mostly clear about 38% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Valparaiso's 2nd-clearest and 12th-windiest month. For the whole year in context, see Valparaiso's year-round climate.

Daytime high
80°
2nd warmest
Overnight low
64°
11th coldest
Rainfall
3.9 in
11.1 wet days
Daylight
13 h 42 min
5:02 AM – 6:43 PM
Cloud cover
53%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
5.67 kWh/m²
Travel score
6.5
out of 10

Valparaiso is city in Porter County, Indiana, United States.

Density
809/km²
people per km²
Founded
1836

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 80°F through the month.

A typical August day in Valparaiso reaches about 80°F in the afternoon and slips back to 64°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 88°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18166
28166
38166
48165
58165
68165
78165
88165
98165
108065
118065
128065
138065
148065
158065
168064
178064
188064
198064
208064
218064
228064
238064
248064
258064
268064
278063
287963
297963
307963
317962

How August really feels in Valparaiso

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.

Valparaiso weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 20°2.710.47.29.30.0
Feb35° / 22°2.185.310.30.0
Mar46° / 30°3.010.53.411.71.1
Apr58° / 41°4.212.41.113.13.9
May68° / 52°4.512.9014.35.9
Jun78° / 62°4.111.9014.96.3
Jul82° / 66°3.911.9014.76.2
Aug80° / 64°3.911.1013.76.5
Sep74° / 57°3.29.1012.37.0
Oct62° / 46°3.3100.210.95.2
Nov48° / 35°2.99.61.79.71.8
Dec37° / 26°2.49.34.99.10.0

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 20% of August, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35941
45941
55842
65941
75941
85941
95941
105941
115842
125941
135941
145941
155842
165842
175842
185941
195842
205842
215842
225743
235743
245743
255743
265842
275842
285842
295941
305842
315842

Chance of precipitation in August

Any precipitation

Valparaiso gets around 3.9 in of rain over 11.1 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 35% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
435
535
635
735
835
935
1036
1136
1236
1336
1437
1537
1637
1737
1837
1937
2037
2137
2236
2336
2435
2535
2634
2733
2833
2932
3032
3131

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 26% of days. Sticky, muggy-or-worse air turns up on roughly 39% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
18232627151
28232626151
38232626151
49242626151
59242625151
69242625151
79242625151
810242624151
910242624151
1010242624151
1111242624151
1211242623151
1311252623151
1411252623151
1511252623141
1611252624141
1711252624141
1811242624131
1911242625131
2011232625131
2111232726131
2211232726131
2312232726121
2412232626121
2512232626121
2613232626111
2714242525111
2815242525100
2915242525100
301625252590
311825242490

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 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 78 minutes over August. Sunrise moves from 4:47 AM to 5:18 AM, and sunset from 7:02 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:477:02
214.24:487:01
314.24:497:00
414.14:506:59
514.14:516:57
614.14:526:56
714.04:536:55
814.04:546:54
914.04:556:52
1013.94:566:51
1113.94:576:50
1213.84:586:48
1313.84:596:47
1413.85:006:46
1513.75:016:44
1613.75:026:43
1713.65:036:41
1813.65:046:40
1913.65:056:38
2013.55:066:37
2113.55:076:35
2213.45:086:34
2313.45:096:32
2413.35:106:30
2513.35:116:29
2613.25:126:27
2713.25:136:26
2813.25:156:24
2913.15:166:22
3013.15:176:21
3113.05:186:19

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.67 kWh/m².

For context, solar energy here swings from a low near 1.58 kWh/m² to a high of 6.55 kWh/m² in June across the year — August's 5.67 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.1Intense
36.1Intense
46.1Intense
56.0Intense
66.0Bright
76.0Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.8Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.6Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.4Bright
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 Valparaiso?

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
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Valparaiso in August

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

In August, Valparaiso sees daytime highs around 80°F and nights near 64°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Valparaiso in August

The nearest coast averages about 73°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 mi away) is warmest in August at about 73°F and coldest in February near 35°F.

It's comfortable for a long swim from Jul 10 to Sep 16 — about 2.3 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb35Bracing
Mar35Bracing
Apr39Bracing
May46Bracing
Jun59Cool
Jul70Refreshing
Aug73Refreshing
Sep68Refreshing
Oct58Bracing
Nov49Bracing
Dec42Bracing

UV index in Valparaiso 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 Valparaiso peaks around June 21 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 21UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Valparaiso 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 Valparaiso 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 1516 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar14Moderate
Apr13Moderate
May15Moderate
Jun15Moderate
Jul17Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Valparaiso?

Valparaiso sits at 41.5°N, 87.1°W, 794 ft above sea level, in United States. The nearest listed city is Portage, 9.3 mi away.

Topography around Valparaiso

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

Within 2 miles, the terrain around Valparaiso has only modest variations in elevation — a maximum elevation change of 217 ft around an average of 774 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 315 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 689 ft.

The land around Valparaiso is covered by trees (46%), artificial surfaces (28%) and grassland (22%) within 2 miles, cropland (46%) and trees (30%) within 10 miles, and cropland (45%) and water (22%) within 50 miles.

2 miles
217 ft
10 miles
315 ft
50 miles
689 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Portage 9.3 mi · Hobart 11 mi · Merrillville 14 mi · Crown Point 16 mi · Gary 17 mi · Michigan City 18 mi · Griffith 19 mi · La Porte 21 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 Valparaiso (41.4731°, -87.0611°, elevation 794 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).