Los Álamos in Summer
In summer (December, January and February), Los Álamos sees average daytime highs around 18°C and overnight lows near 12°C, with 70 mm of rain over about 10 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 16°C in early December to 18°C by late February. The sky is clear or mostly clear about 69% of the time across summer, and the air most often feels dry.
Summer is Los Álamos's best season of the year to visit on our travel score. For the whole year in context, see Los Álamos's year-round climate.
- Avg daytime high
- 18°C
- warmest season of the year
- Avg overnight low
- 12°C
- Rainfall
- 70 mm
- 10 wet days
- Avg wind
- 18 km/h
- Travel score
- 7.1
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Los Álamos in Summer
Over the season highs climb from about 16°C in early December to 18°C by late February.
A typical summer day in Los Álamos reaches about 18°C and drops to 12°C overnight. The warmest of the three months is January, the coolest December.
Los Álamos 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 | 18° / 12° | 15 | 2.9 | 14.3 | 7.5 |
| Feb | 18° / 12° | 19 | 2.7 | 13.5 | 7.5 |
| Mar | 17° / 12° | 33 | 5.1 | 12.3 | 6.6 |
| Apr | 15° / 10° | 77 | 7.6 | 11.1 | 4.9 |
| May | 13° / 9° | 172 | 12.4 | 10 | 3.5 |
| Jun | 12° / 8° | 254 | 16.4 | 9.5 | 2.5 |
| Jul | 11° / 7° | 208 | 15.6 | 9.7 | 2.4 |
| Aug | 11° / 7° | 174 | 14.4 | 10.6 | 2.6 |
| Sep | 12° / 8° | 90 | 10.1 | 11.7 | 3.3 |
| Oct | 13° / 9° | 74 | 9.3 | 13 | 4.0 |
| Nov | 15° / 10° | 42 | 6 | 14 | 5.1 |
| Dec | 17° / 11° | 36 | 4.6 | 14.6 | 6.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 69% of the time across summer.
Chance of precipitation in Summer
Los Álamos gets around 70 mm of rain over 10 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 18 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 24 min in early December to 12 h 54 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 7.9 kWh/m².
Hazard calendar for Los Álamos
None of Los Álamos's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Los Álamos's rainy season runs May–August, when most of the year's rain falls.
Is summer a good time to visit Los Álamos?
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 Los Álamos for general sightseeing.
What to pack for Los Álamos in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Los Álamos sees daytime highs around 18°C and nights near 12°C. Pack sun protection. Worth having: a warm layer. About 10 days see rain.
Sea temperature near Los Álamos in Summer
The nearest coast averages about 15°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 15 km away) is warmest in January at about 15°C and coldest in August near 12°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) | 15 | 15 | 15 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 15 | Bracing |
| Mar | 15 | Bracing |
| Apr | 14 | Bracing |
| May | 13 | Bracing |
| Jun | 13 | Bracing |
| Jul | 12 | Bracing |
| Aug | 12 | Bracing |
| Sep | 12 | Bracing |
| Oct | 12 | Bracing |
| Nov | 13 | Bracing |
| Dec | 14 | Bracing |
UV index in Los Álamos in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Los Álamos peaks around December 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 11 | 8 | 5 | 2 | 2 | 2 | 3 | 5 | 8 | 10 | 12 |
| Level | Extreme | Extreme | Very high | Moderate | Moderate | Low | Moderate | Moderate | Moderate | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 11 | Extreme |
| Mar | 8 | Very high |
| Apr | 5 | Moderate |
| May | 2 | Moderate |
| Jun | 2 | Low |
| Jul | 2 | Moderate |
| Aug | 3 | Moderate |
| Sep | 5 | Moderate |
| Oct | 8 | Very high |
| Nov | 10 | Very high |
| Dec | 12 | Extreme |
Where is Los Álamos?
Los Álamos sits at 37.6°S, 73.5°W, 178 m above sea level, in Chile. The nearest listed city is Lebu, 17 km away.
Topography around Los Álamos
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Los Álamos.
Within 3 km, the terrain around Los Álamos has only modest variations in elevation — a maximum elevation change of 160 m around an average of 166 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 821 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,511 m.
The land around Los Álamos is covered by trees (82%) within 3 km, trees (85%) within 16 km, and trees (49%) and water (39%) 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 Los Álamos (-37.628°, -73.4601°, elevation 178 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.