Barranco in Summer
In summer (December, January and February), Barranco sees average daytime highs around 22°C and overnight lows near 20°C, with 20 mm of rain over about 5 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Over the season highs climb from about 19°C in early December to 23°C by late February. The sky is clear or mostly clear about 4% of the time across summer, and the air most often feels muggy.
Summer is Barranco's 2nd-best season to visit on our travel score. Barranco 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 Barranco's year-round climate.
- Avg daytime high
- 22°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 20 mm
- 5 wet days
- Avg wind
- 13 km/h
- Travel score
- 7.2
- 2nd-best season
- Months
- Dec · Jan · Feb
Temperature in Barranco in Summer
Over the season highs climb from about 19°C in early December to 23°C by late February.
A typical summer day in Barranco reaches about 22°C and drops to 20°C overnight. The warmest of the three months is February, the coolest December.
Barranco weather by month
How the three summer months (December, January and February) 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° | 7 | 1.7 | 12.6 | 7.3 |
| Feb | 23° / 21° | 9 | 2.4 | 12.4 | 7.3 |
| Mar | 22° / 21° | 4 | 1.3 | 12.1 | 7.4 |
| Apr | 21° / 19° | 2 | 0.3 | 11.7 | 7.4 |
| May | 19° / 17° | 6 | 2.1 | 11.4 | 7.0 |
| Jun | 17° / 16° | 14 | 5.2 | 11.3 | 6.1 |
| Jul | 17° / 15° | 17 | 6.8 | 11.4 | 5.5 |
| Aug | 16° / 15° | 15 | 5.8 | 11.6 | 5.5 |
| Sep | 16° / 15° | 10 | 3.4 | 11.9 | 5.7 |
| Oct | 17° / 15° | 5 | 1.2 | 12.3 | 6.2 |
| Nov | 18° / 16° | 4 | 0.8 | 12.6 | 6.8 |
| Dec | 20° / 18° | 4 | 1 | 12.7 | 7.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 4% of the time across summer.
Chance of precipitation in Summer
Barranco gets around 20 mm of rain over 5 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 13 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 42 min in early December to 12 h 18 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.4 kWh/m².
Is summer a good time to visit Barranco?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Barranco for general sightseeing.
What to pack for Barranco in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Barranco sees daytime highs around 22°C and nights near 20°C. Pack sun protection. Worth having: light clothes. About 5 days see rain.
Sea temperature near Barranco in Summer
The nearest coast averages about 21°C across summer — 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 Barranco in Summer
Clear-sky midday UV across summer averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Barranco 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 Barranco in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Barranco is worst in March — around 23 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 20 | 23 | 22 | 23 | 22 | 20 | 19 | 18 | 18 | 17 | 17 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 20 | Moderate |
| Mar | 23 | Moderate |
| Apr | 22 | Moderate |
| May | 23 | Moderate |
| Jun | 22 | Moderate |
| Jul | 20 | Moderate |
| Aug | 19 | Moderate |
| Sep | 18 | Moderate |
| Oct | 18 | Moderate |
| Nov | 17 | Moderate |
| Dec | 17 | Moderate |
Where is Barranco?
Barranco sits at 12.1°S, 77.0°W, 58 m above sea level, in Peru. The nearest listed city is Santiago de Surco, 1.0 km away.
Topography around Barranco
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Barranco.
Within 3 km, the terrain around Barranco has only modest variations in elevation — a maximum elevation change of 124 m around an average of 58 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,046 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,959 m.
The land around Barranco is covered by artificial surfaces (67%) and water (25%) within 3 km, artificial surfaces (42%) and water (40%) within 16 km, and water (44%) and bare terrain (31%) 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 Barranco (-12.143°, -77.0186°, elevation 58 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.