Callao weather in August

In August, Callao sees average daytime highs of 16°C and overnight lows near 15°C, with 5 mm of rain across 1.2 wet days and about 11.6 hours of daylight. It is the 11th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 16°C through the month. The sky is clear or mostly clear about 6% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of August to 11 h 48 min by month's end. Set against the rest of the year, August is Callao's 2nd-clearest and 1st-windiest month. For the whole year in context, see Callao's year-round climate.

Daytime high
16°
11th warmest
Overnight low
15°
2nd coldest
Rainfall
5 mm
1.2 wet days
Daylight
11 h 36 min
6:25 AM – 6:01 PM
Cloud cover
70%
2nd clearest
Wind
21 km/h
1st windiest
Solar energy
5.1 kWh/m²
Travel score
6.0
out of 10

Callao is city and main seaport of Peru.

Air quality
High
PM2.5 25.5 µg/m³ · 2016
Density
8,343/km²
people per km²
Founded
1537

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 16°C through the month.

A typical August day in Callao reaches about 16°C in the afternoon and slips back to 15°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 17°C. Set against its neighbours, August runs on par with July and on par with September.

10°13°15°18°20°151015202531
Avg high (°C)Avg low (°C)
11615
21615
31615
41615
51615
61615
71615
81615
91615
101615
111615
121615
131615
141615
151615
161615
171615
181615
191615
201615
211615
221615
231615
241615
251615
261615
271615
281615
291615
301615
311615

Callao weather by month

How August compares with the rest of the year at a glance. August is the 11th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 20°51.512.67.4
Feb23° / 21°8212.47.4
Mar22° / 21°61.712.17.4
Apr20° / 19°20.211.77.4
May19° / 18°20.211.57.1
Jun18° / 17°51.111.36.5
Jul17° / 16°51.211.46.1
Aug16° / 15°51.211.66.0
Sep16° / 15°40.511.96.0
Oct17° / 16°30.312.36.2
Nov18° / 17°20.112.66.9
Dec20° / 19°30.612.77.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22179
32278
42377
52377
62476
72476
82575
92674
102773
112773
122872
132872
143070
153070
163169
173268
183268
193268
203268
213268
223268
233367
243367
253367
263367
273466
283466
293466
303466
313466

Chance of precipitation in August

Any precipitation

Callao gets around 5 mm of rain over 1.2 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 4% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
53
63
73
83
93
103
113
123
133
143
153
164
174
184
194
204
215
225
235
245
255
264
274
284
294
303
313

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
119621
219621
329521
429521
529521
629521
729422
829422
939322
1039322
1139322
1239322
1339322
1439322
1539421
1639421
1739421
1839421
1939331
2039331
2139430
2239430
2339430
2439430
2539430
2639430
2739340
2839340
2939340
3039340
3139241

Wind in August

Winds average 21 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 20 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
121breezy
221breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3020breezy
3120breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 30 min at the start of August to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over August. Sunrise moves from 6:31 AM to 6:16 AM, and sunset from 5:58 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:315:58
211.56:305:59
311.56:305:59
411.56:305:59
511.56:295:59
611.56:295:59
711.56:295:59
811.56:286:00
911.56:286:00
1011.56:276:00
1111.56:276:00
1211.66:276:00
1311.66:266:00
1411.66:266:00
1511.66:256:00
1611.66:256:01
1711.66:246:01
1811.66:246:01
1911.66:236:01
2011.66:236:01
2111.66:226:01
2211.76:216:01
2311.76:216:01
2411.76:206:01
2511.76:206:01
2611.76:196:01
2711.76:196:01
2811.76:186:01
2911.76:176:01
3011.76:176:01
3111.86:166:01

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.1 kWh/m².

For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 6.75 kWh/m² in November across the year — August's 5.1 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.1Bright
165.1Bright
175.1Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.4Bright
275.4Bright
285.4Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in August

Is August a good time to visit Callao?

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

6.0
Sightseeing
11th-best month of the year
1.0
Beach & pool
12th-best month of the year

August is a reasonable time to visit Callao for sightseeing.

What to pack for Callao in August

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

In August, Callao sees daytime highs around 16°C and nights near 15°C. Worth packing: a warm layer, sun protection and a windbreaker.

a warm layersun protectiona windbreaker

Sea temperature near Callao in August

The nearest coast averages about 17°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 22°C and coldest in September near 17°C.

It's comfortable for a long swim from Jan 1 to Apr 9 — about 3.3 months when the water holds above 20°C.

16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb22Refreshing
Mar21Refreshing
Apr20Cool
May19Cool
Jun18Cool
Jul18Cool
Aug17Cool
Sep17Cool
Oct17Cool
Nov18Cool
Dec19Cool

UV index in Callao in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Callao peaks around February 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 12UV 15Jun 22UV 8
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar13Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug10Extreme
Sep10Extreme
Oct13Extreme
Nov12Extreme
Dec13Extreme

Air quality in Callao 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 Callao is worst in March — around 30 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Callao's WHO annual average of 25.5 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2030 µg/m³Nov 2022 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb27Moderate
Mar30Moderate
Apr28Moderate
May29Moderate
Jun28Moderate
Jul26Moderate
Aug25Moderate
Sep23Moderate
Oct23Moderate
Nov22Moderate
Dec22Moderate
Location & terrain

Where is Callao?

Callao sits at 12.1°S, 77.1°W, 5 m above sea level, in Peru. The nearest listed city is Carmen De La Legua Reynoso, 4.0 km away.

Topography around Callao

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Callao.

Within 3 km, the terrain around Callao has only modest variations in elevation — a maximum elevation change of 43 m around an average of 10 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 737 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,870 m.

The land around Callao is covered by artificial surfaces (54%) and water (33%) within 3 km, water (60%) and artificial surfaces (30%) within 16 km, and water (50%) and bare terrain (29%) within 80 km.

3 km
43 m
16 km
737 m
80 km
4,870 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Carmen De La Legua Reynoso 4.0 km · Breña 9.0 km · Jesus Maria 10 km · San Isidro 11 km · Lima 12 km · Miraflores 13 km · San Francisco De Borja 15 km · Barranco 16 km

Peru travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
220 V · 60 Hz
Prices
≈ 51% of US
price level, 2025
GDP per capita
$9,684
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
49%
of population, 2024
Homicide rate
8.6
per 100k, 2021
Road deaths
13.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 519
Religion
Catholic 76%Evangelical Christian 16%no religion 5%other religions 3%

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 Callao (-12.0516°, -77.1345°, elevation 5 m), 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).