Callao weather in April

In April, Callao sees average daytime highs of 20°C and overnight lows near 19°C, with 2 mm of rain across 0.2 wet days and about 11.7 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 20°C by the end. The sky is clear or mostly clear about 11% of the time in April, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of April to 11 h 36 min by month's end. Set against the rest of the year, April is Callao's 3rd-clearest and 9th-windiest month. For the whole year in context, see Callao's year-round climate.

Daytime high
20°
4th warmest
Overnight low
19°
9th coldest
Rainfall
2 mm
0.2 wet days
Daylight
11 h 42 min
6:17 AM – 6:01 PM
Cloud cover
72%
3rd clearest
Wind
16 km/h
9th windiest
Solar energy
5.7 kWh/m²
Travel score
7.4
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 20°C by the end.

A typical April day in Callao reaches about 20°C in the afternoon and slips back to 19°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 22°C. Set against its neighbours, April runs about 2°C cooler than March and about 2°C warmer than May.

15°18°20°23°25°151015202530
Avg high (°C)Avg low (°C)
12120
22120
32120
42120
52120
62120
72120
82120
92120
102119
112119
122119
132119
142019
152019
162019
172019
182019
192019
202019
212019
222019
232019
242019
252019
262019
272019
282019
292018
302018

Callao weather by month

How April compares with the rest of the year at a glance. April is the 4th-warmest and 12th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 72%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11882
21882
31882
41882
52080
62080
72179
82278
92476
102476
112773
122872
132971
143070
153169
163169
173268
183367
193367
203367
213466
223466
233367
243268
253367
263466
273466
283466
293466
303466

Chance of precipitation in April

Any precipitation

Callao gets around 2 mm of rain over 0.2 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 3% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
42
52
62
72
81
91
101
111
121
131
141
151
161
171
180
190
200
210
220
230
240
250
260
270
280
290
300

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the muggy band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 53% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1017767
2018757
3020746
4022726
5023725
6025705
7027685
8029674
9031654
10033634
11036613
12038593
13040582
14043552
15045532
16048511
17050491
18053461
19055441
20057421
21061390
22063370
23066340
24068320
25070300
26072280
27074260
28075250
29077230
30177220

Wind in April

Winds average 16 km/h in April.

Across April, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 54 min at the start of April to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over April. Sunrise moves from 6:16 AM to 6:18 AM, and sunset from 6:10 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:166:10
211.96:166:10
311.96:166:09
411.96:166:08
511.96:166:08
611.86:166:07
711.86:166:06
811.86:166:06
911.86:166:05
1011.86:166:04
1111.86:176:04
1211.86:176:03
1311.86:176:03
1411.86:176:02
1511.76:176:01
1611.76:176:01
1711.76:176:00
1811.76:176:00
1911.76:175:59
2011.76:175:58
2111.76:175:58
2211.76:175:57
2311.76:175:57
2411.66:175:56
2511.66:185:56
2611.66:185:55
2711.66:185:55
2811.66:185:54
2911.66:185:54
3011.66:185:54

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.7 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 — April's 5.7 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
36.0Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
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
Planning a trip in April

Is April a good time to visit Callao?

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

7.4
Sightseeing
1st-best month of the year
4.1
Beach & pool
4th-best month of the year

April is one of the better times to visit Callao for general sightseeing.

What to pack for Callao in April

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

In April, Callao sees daytime highs around 20°C and nights near 19°C. Worth packing: sun protection.

sun protection

Sea temperature near Callao in April

The nearest coast averages about 20°C in April — 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 April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 12 (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 April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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
April 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).