La Unión in Winter
In winter (June, July and August), La Unión sees average daytime highs around 11°C and overnight lows near 4°C, with 693 mm of rain over about 54 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across winter, daytime highs hold fairly steady around 11°C. The sky is clear or mostly clear about 11% of the time across winter, and the air most often feels dry.
Winter is La Unión's weakest season of the year to visit on our travel score. For the whole year in context, see La Unión's year-round climate.
- Avg daytime high
- 11°C
- coldest season of the year
- Avg overnight low
- 4°C
- Rainfall
- 693 mm
- 54 wet days
- Avg wind
- 10 km/h
- Travel score
- 2.1
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in La Unión in Winter
Across winter, daytime highs hold fairly steady around 11°C.
A typical winter day in La Unión reaches about 11°C and drops to 4°C overnight. The warmest of the three months is August, the coolest July.
La Unión 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° / 10° | 36 | 6 | 14.5 | 7.5 |
| Feb | 22° / 10° | 41 | 5.1 | 13.6 | 7.6 |
| Mar | 20° / 9° | 63 | 7.6 | 12.3 | 6.7 |
| Apr | 16° / 7° | 109 | 10.6 | 11 | 4.9 |
| May | 13° / 6° | 189 | 15.4 | 9.8 | 3.1 |
| Jun | 11° / 4° | 254 | 18.3 | 9.2 | 2.0 |
| Jul | 10° / 4° | 229 | 17.8 | 9.4 | 1.9 |
| Aug | 11° / 4° | 210 | 17.8 | 10.4 | 2.3 |
| Sep | 13° / 5° | 125 | 13.5 | 11.7 | 3.4 |
| Oct | 15° / 6° | 110 | 13.4 | 13.1 | 4.3 |
| Nov | 17° / 8° | 74 | 9.9 | 14.2 | 5.5 |
| Dec | 20° / 9° | 64 | 8 | 14.8 | 6.6 |
Cloud cover in Winter
The sky is clear or mostly clear about 11% of the time across winter.
Chance of precipitation in Winter
La Unión gets around 693 mm of rain over 54 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 18 min in early June to 11 hours 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 1.7 kWh/m².
Hazard calendar for La Unión
In winter, La Unión overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
La Unión's rainy season runs May–September, when most of the year's rain falls.
Is winter a good time to visit La Unión?
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 weaker month for outdoor sightseeing in La Unión.
What to pack for La Unión in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, La Unión sees daytime highs around 11°C and nights near 4°C. Pack a warm layer and rain gear. About 54 days see rain.
Sea temperature near La Unión in Winter
The nearest coast averages about 12°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 66 km away) is warmest in January at about 14°C and coldest in August near 11°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 11 | 11 | 12 | 13 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 14 | Bracing |
| Feb | 14 | Bracing |
| Mar | 14 | Bracing |
| Apr | 13 | Bracing |
| May | 13 | Bracing |
| Jun | 12 | Bracing |
| Jul | 11 | Bracing |
| Aug | 11 | Bracing |
| Sep | 11 | Bracing |
| Oct | 12 | Bracing |
| Nov | 13 | Bracing |
| Dec | 14 | Bracing |
UV index in La Unión in Winter
Clear-sky midday UV across winter averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in La Unión peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 11 | 7 | 5 | 2 | 2 | 2 | 3 | 4 | 7 | 9 | 12 |
| Level | Extreme | Extreme | Very high | Moderate | Moderate | Low | Low | Moderate | Moderate | High | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 11 | Extreme |
| Mar | 7 | Very high |
| Apr | 5 | Moderate |
| May | 2 | Moderate |
| Jun | 2 | Low |
| Jul | 2 | Low |
| Aug | 3 | Moderate |
| Sep | 4 | Moderate |
| Oct | 7 | High |
| Nov | 9 | Very high |
| Dec | 12 | Extreme |
Air quality in La Unión 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 La Unión is worst in March — around 36 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (February, 22 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to La Unión's WHO annual average of 29.9 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 24 | 22 | 36 | 36 | 28 | 26 | 27 | 33 | 36 | 33 | 31 | 27 |
| Level | Moderate | Moderate | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 24 | Moderate |
| Feb | 22 | Moderate |
| Mar | 36 | Poor |
| Apr | 36 | Poor |
| May | 28 | Moderate |
| Jun | 26 | Moderate |
| Jul | 27 | Moderate |
| Aug | 33 | Moderate |
| Sep | 36 | Poor |
| Oct | 33 | Moderate |
| Nov | 31 | Moderate |
| Dec | 27 | Moderate |
Where is La Unión?
La Unión sits at 40.3°S, 73.1°W, 32 m above sea level, in Chile. The nearest listed city is Río Bueno, 12 km away.
Topography around La Unión
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of La Unión.
Within 3 km, the terrain around La Unión has only modest variations in elevation — a maximum elevation change of 80 m around an average of 49 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 528 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,782 m.
The land around La Unión is covered by cropland (41%), trees (25%) and grassland (20%) within 3 km, trees (44%), cropland (29%) and grassland (25%) within 16 km, and trees (51%) and grassland (21%) within 80 km.
Chile travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / L
- 220 V · 50 Hz
- Prices
- ≈ 48% of US
- price level, 2025
- GDP per capita
- $17,995
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 6.3
- per 100k, 2023
- Road deaths
- 14.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 517
- 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 La Unión (-40.2931°, -73.0817°, elevation 32 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.