Santa Cruz weather in December

In December, Santa Cruz sees average daytime highs of 27°C and overnight lows near 12°C, with 10 mm of rain across 1.3 wet days and about 14.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 79% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 12 min at the start of December to 14 h 18 min by month's end. Set against the rest of the year, December is Santa Cruz's 4th-clearest and 1st-windiest month. For the whole year in context, see Santa Cruz's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
12°
10th coldest
Rainfall
10 mm
1.3 wet days
Daylight
14 h 18 min
6:32 AM – 8:51 PM
Cloud cover
20%
4th clearest
Wind
8 km/h
1st windiest
Solar energy
8.75 kWh/m²
Travel score
8.5
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 28°C by the end.

A typical December day in Santa Cruz reaches about 27°C in the afternoon and slips back to 12°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12611
22611
32612
42612
52612
62612
72612
82612
92712
102712
112712
122712
132712
142712
152712
162712
172713
182713
192713
202813
212813
222813
232813
242813
252813
262813
272813
282813
292813
302813
312814

Santa Cruz weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 14°30.614.17.7
Feb28° / 14°50.713.38.2
Mar26° / 12°81.412.38.8
Apr21° / 413.411.27.8
May17° / 115710.25.6
Jun14° / 19510.29.73.9
Jul14° / 1308.89.94.0
Aug15° / 1087.810.74.9
Sep18° / 585.811.86.4
Oct21° / 354.212.97.5
Nov25° / 10°132.213.88.6
Dec27° / 12°101.314.38.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 79% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 11%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18416
28515
38515
48515
58515
68515
78614
88614
98614
108713
118812
128812
138812
148812
158911
168911
178911
188911
198911
209010
219010
229010
239010
249010
25919
26919
27919
28928
29928
30937
31937

Chance of precipitation in December

Any precipitation

Santa Cruz gets around 10 mm of rain over 1.3 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 4% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
45
55
65
75
85
95
104
114
124
134
144
154
164
174
184
194
203
213
223
233
243
253
263
273
283
293
302
312

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19460
29370
39370
49280
59190
690100
789110
888120
987130
1087130
1186140
1285150
1385150
1484160
1584160
1684160
1783170
1883170
1982180
2082180
2181190
2280200
2380200
2478211
2577221
2676231
2775241
2874251
2974251
3073261
3173261

Wind in December

Winds average 8 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 12 min at the start of December to 14 h 18 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 6:31 AM to 6:40 AM, and sunset from 8:40 PM to 8:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.26:318:40
214.26:318:41
314.26:308:41
414.26:308:42
514.26:308:43
614.26:308:44
714.26:318:45
814.26:318:45
914.36:318:46
1014.36:318:47
1114.36:318:48
1214.36:318:48
1314.36:318:49
1414.36:328:50
1514.36:328:50
1614.36:328:51
1714.36:338:52
1814.36:338:52
1914.36:338:53
2014.36:348:53
2114.36:348:54
2214.36:358:54
2314.36:358:55
2414.36:368:55
2514.36:368:55
2614.36:378:56
2714.36:378:56
2814.36:388:57
2914.36:398:57
3014.36:398:57
3114.36:408:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.75 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.09 kWh/m² to a high of 8.75 kWh/m² in December across the year — December's 8.75 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.5Intense
28.5Intense
38.5Intense
48.5Intense
58.6Intense
68.6Intense
78.6Intense
88.6Intense
98.6Intense
108.7Intense
118.7Intense
128.7Intense
138.7Intense
148.7Intense
158.8Intense
168.8Intense
178.8Intense
188.8Intense
198.8Intense
208.8Intense
218.8Intense
228.9Intense
238.9Intense
248.9Intense
258.9Intense
268.9Intense
278.9Intense
288.9Intense
298.9Intense
308.9Intense
318.9Intense
Planning a trip in December

Hazard calendar for Santa Cruz

In seasonPeak

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

Santa Cruz'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 Santa Cruz?

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

8.5
Sightseeing
3rd-best month of the year
8.7
Beach & pool
3rd-best month of the year

December is one of the better times to visit Santa Cruz for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Santa Cruz in December

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

In December, Santa Cruz sees daytime highs around 27°C and nights near 12°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Santa Cruz in December

The nearest coast averages about 15°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 69 km away) is warmest in February at about 16°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°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr15Bracing
May14Bracing
Jun13Bracing
Jul13Bracing
Aug12Bracing
Sep13Bracing
Oct13Bracing
Nov14Bracing
Dec15Bracing

UV index in Santa Cruz 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 Santa Cruz peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateHighVery highExtremeJan 16UV 13Jun 15UV 2
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr5High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct9Very high
Nov11Extreme
Dec12Extreme

Air quality in Santa Cruz in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Santa Cruz is worst in May — around 41 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (November, 19 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 2040 µg/m³Nov 2319 µg/m³
PM2.5 (µg/m³)Level
Jan34Moderate
Feb22Moderate
Mar22Moderate
Apr29Moderate
May41Poor
Jun37Poor
Jul37Poor
Aug35Moderate
Sep32Moderate
Oct24Moderate
Nov19Moderate
Dec19Moderate
Location & terrain

Where is Santa Cruz?

Santa Cruz sits at 34.6°S, 71.4°W, 174 m above sea level, in Chile. The nearest listed city is Chimbarongo, 31 km away.

Topography around Santa Cruz

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

Within 3 km, the terrain around Santa Cruz has only modest variations in elevation — a maximum elevation change of 35 m around an average of 164 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,083 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,840 m.

The land around Santa Cruz is covered by cropland (41%) and trees (25%) within 3 km, trees (32%) and cropland (31%) within 16 km, and trees (36%) and grassland (28%) within 80 km.

3 km
35 m
16 km
1,083 m
80 km
3,840 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Chimbarongo 31 km · San Vicente 35 km · San Vicente de Tagua Tagua 35 km · Curicó 40 km · Sagrada Familia 40 km · Rengo 53 km · Molina 53 km · Pichilemu 65 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 Santa Cruz (-34.6388°, -71.3658°, elevation 174 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).