Callao in Winter
In winter (June, July and August), Callao sees average daytime highs around 17°C and overnight lows near 16°C, with 15 mm of rain over about 4 wet days across the season. It is the coldest season of the year and the 2nd-wettest season.
Across winter, daytime highs hold fairly steady around 17°C. The sky is clear or mostly clear about 5% of the time across winter, and the air most often feels comfortable.
Winter is Callao's weakest season of the year to visit on our travel score. Callao has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Callao's year-round climate.
- Avg daytime high
- 17°C
- coldest season of the year
- Avg overnight low
- 16°C
- Rainfall
- 15 mm
- 4 wet days
- Avg wind
- 20 km/h
- Travel score
- 6.2
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Callao in Winter
Across winter, daytime highs hold fairly steady around 17°C.
A typical winter day in Callao reaches about 17°C and drops to 16°C overnight. The warmest of the three months is June, the coolest August.
Callao weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 22° / 20° | 5 | 1.5 | 12.6 | 7.4 |
| Feb | 23° / 21° | 8 | 2 | 12.4 | 7.4 |
| Mar | 22° / 21° | 6 | 1.7 | 12.1 | 7.4 |
| Apr | 20° / 19° | 2 | 0.2 | 11.7 | 7.4 |
| May | 19° / 18° | 2 | 0.2 | 11.5 | 7.1 |
| Jun | 18° / 17° | 5 | 1.1 | 11.3 | 6.5 |
| Jul | 17° / 16° | 5 | 1.2 | 11.4 | 6.1 |
| Aug | 16° / 15° | 5 | 1.2 | 11.6 | 6.0 |
| Sep | 16° / 15° | 4 | 0.5 | 11.9 | 6.0 |
| Oct | 17° / 16° | 3 | 0.3 | 12.3 | 6.2 |
| Nov | 18° / 17° | 2 | 0.1 | 12.6 | 6.9 |
| Dec | 20° / 19° | 3 | 0.6 | 12.7 | 7.1 |
Cloud cover in Winter
The sky is clear or mostly clear about 5% of the time across winter.
Chance of precipitation in Winter
Callao gets around 15 mm of rain over 4 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 20 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 18 min in early June to 11 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.7 kWh/m².
Is winter a good time to visit Callao?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Callao for sightseeing.
What to pack for Callao in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Callao sees daytime highs around 17°C and nights near 16°C. Worth packing: a warm layer, sun protection and a windbreaker.
Sea temperature near Callao in Winter
The nearest coast averages about 18°C across winter — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 21 | 22 | 21 | 20 | 19 | 18 | 18 | 17 | 17 | 17 | 18 | 19 |
| Comfort | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 21 | Refreshing |
| Apr | 20 | Cool |
| May | 19 | Cool |
| Jun | 18 | Cool |
| Jul | 18 | Cool |
| Aug | 17 | Cool |
| Sep | 17 | Cool |
| Oct | 17 | Cool |
| Nov | 18 | Cool |
| Dec | 19 | Cool |
UV index in Callao in Winter
Clear-sky midday UV across winter averages around 9 (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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 16 | 13 | 12 | 10 | 8 | 8 | 10 | 10 | 13 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 16 | Extreme |
| Mar | 13 | Extreme |
| Apr | 12 | Extreme |
| May | 10 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 10 | Extreme |
| Sep | 10 | Extreme |
| Oct | 13 | Extreme |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in Callao in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 22 | 27 | 30 | 28 | 29 | 28 | 26 | 25 | 23 | 23 | 22 | 22 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 27 | Moderate |
| Mar | 30 | Moderate |
| Apr | 28 | Moderate |
| May | 29 | Moderate |
| Jun | 28 | Moderate |
| Jul | 26 | Moderate |
| Aug | 25 | Moderate |
| Sep | 23 | Moderate |
| Oct | 23 | Moderate |
| Nov | 22 | Moderate |
| Dec | 22 | Moderate |
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.
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
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.