Los Álamos weather in December

In December, Los Álamos sees average daytime highs of 17°C and overnight lows near 11°C, with 36 mm of rain across 4.6 wet days and about 14.6 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 17°C by the end. The sky is clear or mostly clear about 61% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 24 min at the start of December to 14 h 36 min by month's end. Set against the rest of the year, December is Los Álamos's 4th-clearest and 2nd-windiest month. For the whole year in context, see Los Álamos's year-round climate.

Daytime high
17°
4th warmest
Overnight low
11°
9th coldest
Rainfall
36 mm
4.6 wet days
Daylight
14 h 36 min
6:32 AM – 9:08 PM
Cloud cover
35%
4th clearest
Wind
18 km/h
2nd windiest
Solar energy
8.18 kWh/m²
Travel score
6.4
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 17°C by the end.

A typical December day in Los Álamos reaches about 17°C in the afternoon and slips back to 11°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 19°C. Set against its neighbours, December runs about 2°C warmer than November and about 2°C cooler than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11611
21611
31611
41611
51611
61611
71611
81611
91611
101611
111611
121611
131611
141711
151711
161711
171711
181711
191711
201711
211711
221711
231711
241712
251712
261712
271712
281712
291712
301812
311812

Los Álamos weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 12°152.914.37.5
Feb18° / 12°192.713.57.5
Mar17° / 12°335.112.36.6
Apr15° / 10°777.611.14.9
May13° / 17212.4103.5
Jun12° / 25416.49.52.5
Jul11° / 20815.69.72.4
Aug11° / 17414.410.62.6
Sep12° / 9010.111.73.3
Oct13° / 749.3134.0
Nov15° / 10°426145.1
Dec17° / 11°364.614.66.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27129
37129
47228
57228
67228
77228
87327
97426
107426
117426
127525
137525
147624
157624
167624
177822
187822
197822
207822
217822
227822
237822
247921
257921
267921
278020
288020
298020
308020
318020

Chance of precipitation in December

Any precipitation

Los Álamos gets around 36 mm of rain over 4.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 15% and peaks near 16% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
116
216
316
416
515
615
715
815
915
1015
1114
1214
1314
1414
1514
1614
1714
1814
1915
2015
2115
2215
2314
2414
2514
2614
2714
2814
2914
3014
3114

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1955
2955
3955
4955
5955
6955
7955
8955
9964
10964
11964
12964
13964
14964
15964
16964
17964
18955
19955
20946
21937
22937
23928
24919
259010
268911
278812
288812
298713
308713
318614

Wind in December

Winds average 18 km/h in December.

Across December, daily wind ranges from about 18 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 24 min at the start of December to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over December. Sunrise moves from 6:31 AM to 6:40 AM, and sunset from 8:56 PM to 9:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.46:318:56
214.46:318:57
314.46:318:58
414.56:318:59
514.56:318:59
614.56:319:00
714.56:319:01
814.56:319:02
914.56:319:03
1014.56:319:03
1114.56:319:04
1214.66:319:05
1314.66:329:06
1414.66:329:06
1514.66:329:07
1614.66:329:08
1714.66:339:08
1814.66:339:09
1914.66:339:09
2014.66:349:10
2114.66:349:10
2214.66:359:11
2314.66:359:11
2414.66:369:12
2514.66:369:12
2614.66:379:13
2714.66:379:13
2814.66:389:13
2914.66:399:14
3014.66:399:14
3114.66:409:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.18 kWh/m².

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 8.3 kWh/m² in January across the year — December's 8.18 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.9Intense
27.9Intense
37.9Intense
47.9Intense
58.0Intense
68.0Intense
78.0Intense
88.0Intense
98.1Intense
108.1Intense
118.1Intense
128.1Intense
138.1Intense
148.2Intense
158.2Intense
168.2Intense
178.2Intense
188.2Intense
198.3Intense
208.3Intense
218.3Intense
228.3Intense
238.3Intense
248.3Intense
258.3Intense
268.4Intense
278.4Intense
288.4Intense
298.4Intense
308.4Intense
318.4Intense
Planning a trip in December

Hazard calendar for Los Álamos

In seasonPeak

None of Los Álamos's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Los Álamos's rainy season runs May–August, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Los Álamos?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.4
Sightseeing
4th-best month of the year
1.3
Beach & pool
4th-best month of the year

December is a reasonable time to visit Los Álamos for sightseeing.

What to pack for Los Álamos in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Los Álamos sees daytime highs around 17°C and nights near 11°C. Pack sun protection. Worth having: a warm layer. About 5 days see rain.

sun protectiona warm layer

Sea temperature near Los Álamos in December

The nearest coast averages about 14°C in December — 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.

10°12°14°16°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan15Bracing
Feb15Bracing
Mar15Bracing
Apr14Bracing
May13Bracing
Jun13Bracing
Jul12Bracing
Aug12Bracing
Sep12Bracing
Oct12Bracing
Nov13Bracing
Dec14Bracing

UV index in Los Álamos in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeDec 23UV 12Jun 16UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar8Very high
Apr5Moderate
May2Moderate
Jun2Low
Jul2Moderate
Aug3Moderate
Sep5Moderate
Oct8Very high
Nov10Very high
Dec12Extreme
Location & terrain

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.

3 km
160 m
16 km
821 m
80 km
1,511 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Lebu 17 km · Curanilahue 20 km · Cañete 20 km · Arauco 44 km · Lota 66 km · Angol 68 km · Nacimiento 71 km · Coronel 72 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
Catholic 57%none 26%Evangelical or Protestant 16%other Christians and traditions related to Christ 1%

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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).