San Juan del Cesar in Summer
In summer (June, July and August), San Juan del Cesar sees average daytime highs around 29°C and overnight lows near 21°C, with 593 mm of rain over about 81 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across summer, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 4% of the time across summer, and the air most often feels muggy.
Summer is San Juan del Cesar's weakest season of the year to visit on our travel score. For the whole year in context, see San Juan del Cesar's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 593 mm
- 81 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.1
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in San Juan del Cesar in Summer
Across summer, daytime highs hold fairly steady around 29°C.
A typical summer day in San Juan del Cesar reaches about 29°C and drops to 21°C overnight. The warmest of the three months is August, the coolest July.
San Juan del Cesar weather by month
How the three summer 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 | 28° / 19° | 63 | 13.2 | 11.4 | 6.1 |
| Feb | 28° / 19° | 63 | 11.6 | 11.6 | 5.7 |
| Mar | 28° / 20° | 143 | 17.3 | 11.9 | 4.8 |
| Apr | 28° / 21° | 274 | 24.6 | 12.2 | 3.6 |
| May | 29° / 21° | 327 | 28.6 | 12.5 | 3.1 |
| Jun | 29° / 21° | 179 | 25 | 12.6 | 3.3 |
| Jul | 29° / 21° | 185 | 26.9 | 12.6 | 3.2 |
| Aug | 30° / 21° | 229 | 29.4 | 12.4 | 2.8 |
| Sep | 29° / 21° | 248 | 29.3 | 12.1 | 2.8 |
| Oct | 28° / 20° | 269 | 29.4 | 11.8 | 3.2 |
| Nov | 28° / 20° | 222 | 25.2 | 11.5 | 3.9 |
| Dec | 28° / 20° | 121 | 18.7 | 11.4 | 5.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 4% of the time across summer.
Chance of precipitation in Summer
San Juan del Cesar gets around 593 mm of rain over 81 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 4 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 36 min in early June to 12 h 12 min by late August. 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 5.5 kWh/m².
Is summer a good time to visit San Juan del Cesar?
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 a weaker month for outdoor sightseeing in San Juan del Cesar.
What to pack for San Juan del Cesar in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, San Juan del Cesar sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 81 days see rain.
Sea temperature near San Juan del Cesar in Summer
The nearest coast averages about 28°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 68 km away) is warmest in October at about 29°C and coldest in February near 25°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 25 | 25 | 25 | 26 | 27 | 28 | 27 | 28 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 25 | Warm |
| Feb | 25 | Warm |
| Mar | 25 | Warm |
| Apr | 26 | Warm |
| May | 27 | Warm |
| Jun | 28 | Warm |
| Jul | 27 | Warm |
| Aug | 28 | Warm |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in San Juan del Cesar in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Juan del Cesar peaks around April 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 10 (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) | 11 | 13 | 14 | 14 | 13 | 13 | 12 | 13 | 13 | 12 | 10 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Extreme |
| Dec | 10 | Very high |
Air quality in San Juan del Cesar 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 San Juan del Cesar is worst in March — around 34 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 20 | 34 | 27 | 26 | 27 | 25 | 27 | 18 | 16 | 13 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 20 | Moderate |
| Mar | 34 | Moderate |
| Apr | 27 | Moderate |
| May | 26 | Moderate |
| Jun | 27 | Moderate |
| Jul | 25 | Moderate |
| Aug | 27 | Moderate |
| Sep | 18 | Moderate |
| Oct | 16 | Moderate |
| Nov | 13 | Moderate |
| Dec | 12 | Good |
Where is San Juan del Cesar?
San Juan del Cesar sits at 10.8°N, 73.0°W, 214 m above sea level, in Colombia. The nearest listed city is Villanueva, 18 km away.
Topography around San Juan del Cesar
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Juan del Cesar.
Within 3 km, the terrain around San Juan del Cesar has only modest variations in elevation — a maximum elevation change of 105 m around an average of 214 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,124 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,722 m.
The land around San Juan del Cesar is covered by grassland (64%) within 3 km, grassland (49%) and trees (38%) within 16 km, and trees (65%) and grassland (22%) within 80 km.
Colombia travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type A / B
- 120 / 240 V · 60 Hz
- Prices
- ≈ 38% of US
- price level, 2025
- GDP per capita
- $8,562
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 74%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 15.4
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 480
- 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 San Juan del Cesar (10.7711°, -73.0031°, elevation 214 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.