Caldera weather in December

In December, Caldera sees average daytime highs of 20°C and overnight lows near 14°C, with 0 mm of rain across 0 wet days and about 13.7 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 84% of the time in December, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of December to 13 h 42 min by month's end. Set against the rest of the year, December is Caldera's 3rd-clearest and 1st-windiest month. For the whole year in context, see Caldera's year-round climate.

Daytime high
20°
4th warmest
Overnight low
14°
9th coldest
Rainfall
0 mm
0 wet days
Daylight
13 h 42 min
6:49 AM – 8:30 PM
Cloud cover
27%
3rd clearest
Wind
12 km/h
1st windiest
Solar energy
9 kWh/m²
Travel score
8.3
out of 10

Caldera is settlement in Chile.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical December day in Caldera reaches about 20°C in the afternoon and slips back to 14°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 21°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11914
21914
31914
41914
51914
61914
71914
81914
91914
101914
111914
121914
131914
142014
152014
162014
172014
182014
192015
202015
212015
222015
232015
242015
252015
262015
272015
282015
292015
302015
312015

Caldera 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
Jan21° / 16°0013.58.6
Feb21° / 16°00138.7
Mar20° / 15°10.112.28.5
Apr19° / 14°10.111.48.0
May17° / 13°30.710.77.2
Jun16° / 11°40.510.36.6
Jul16° / 11°40.710.56.3
Aug16° / 11°30.4116.5
Sep16° / 11°10.111.86.9
Oct17° / 12°00.112.67.3
Nov18° / 13°0013.37.9
Dec20° / 14°0013.78.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 84% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 7%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1964
2964
3964
4964
5964
6955
7955
8955
9955
10955
11946
12946
13937
14937
15937
16937
17937
18937
19937
20937
21937
22928
23928
24928
25928
26928
27928
28919
29919
309010
319010

Chance of precipitation in December

Any precipitation

Caldera gets around 0 mm of rain over 0 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 0% and peaks near 0% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310

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 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
186140
285150
384160
483170
582180
680200
778220
876240
974260
1072280
1169310
1267330
1365350
1462380
1560400
1657430
1754460
1852480
1949510
2047530
2144560
2242580
2339610
2437630
2535650
2633670
2731690
2829710
2927730
3025750
3123761

Wind in December

Winds average 12 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 36 min at the start of December to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:46 AM to 6:56 AM, and sunset from 8:21 PM to 8:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.66:468:21
213.66:468:21
313.66:468:22
413.66:468:23
513.66:468:23
613.66:468:24
713.66:468:25
813.76:468:25
913.76:478:26
1013.76:478:27
1113.76:478:27
1213.76:478:28
1313.76:488:29
1413.76:488:29
1513.76:488:30
1613.76:498:30
1713.76:498:31
1813.76:498:31
1913.76:508:32
2013.76:508:32
2113.76:518:33
2213.76:518:33
2313.76:528:34
2413.76:528:34
2513.76:538:35
2613.76:538:35
2713.76:548:36
2813.76:548:36
2913.76:558:36
3013.76:558:37
3113.76:568:37

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 9 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 9 kWh/m² in December across the year — December's 9 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.9Intense
28.9Intense
38.9Intense
48.9Intense
58.9Intense
68.9Intense
78.9Intense
89.0Intense
99.0Intense
109.0Intense
119.0Intense
129.0Intense
139.0Intense
149.0Intense
159.0Intense
169.0Intense
179.0Intense
189.0Intense
199.0Intense
209.0Intense
219.0Intense
229.0Intense
239.0Intense
249.0Intense
259.0Intense
269.0Intense
279.0Intense
289.0Intense
299.0Intense
309.0Intense
319.0Intense
Planning a trip in December

Is December a good time to visit Caldera?

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

8.3
Sightseeing
4th-best month of the year
4.0
Beach & pool
4th-best month of the year

December is one of the better times to visit Caldera for general sightseeing.

What to pack for Caldera in December

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

In December, Caldera sees daytime highs around 20°C and nights near 14°C. Pack sun protection.

sun protection

Sea temperature near Caldera in December

The nearest coast averages about 18°C in December — 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 20°C and coldest in August near 14°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

12°14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan19Cool
Feb20Cool
Mar19Cool
Apr18Cool
May16Cool
Jun15Cool
Jul15Bracing
Aug14Bracing
Sep14Bracing
Oct15Cool
Nov16Cool
Dec18Cool

UV index in Caldera in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks 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 Caldera peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 19UV 14Jun 22UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr7High
May5High
Jun4Moderate
Jul4Moderate
Aug6High
Sep9Very high
Oct12Extreme
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Caldera?

Caldera sits at 27.1°S, 70.8°W, 23 m above sea level, in Chile. The nearest listed city is Copiapó, 59 km away.

La SerenaCoquimboVicuñaBelénAntofagastaOvalle

Topography around Caldera

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Caldera.

Within 3 km, the terrain around Caldera has only modest variations in elevation — a maximum elevation change of 82 m around an average of 27 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 789 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,395 m.

The land around Caldera is covered by bare terrain (64%) and water (23%) within 3 km, bare terrain (60%) and water (38%) within 16 km, and bare terrain (65%) and water (33%) within 80 km.

3 km
82 m
16 km
789 m
80 km
2,395 m
shrubsgrasslandartificial surfacesbare terrainwater
December weather nearby: Copiapó 59 km · Vallenar 168 km · La Serena 318 km · Coquimbo 325 km · Vicuña 330 km · Belén 380 km · Antofagasta 382 km · Ovalle 395 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 Caldera (-27.0681°, -70.8192°, elevation 23 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).