Villa Mercedes weather in December

In December, Villa Mercedes sees average daytime highs of 29°C and overnight lows near 17°C, with 97 mm of rain across 11.8 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 30°C by the end. The sky is clear or mostly clear about 54% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Villa Mercedes's 2nd-clearest and 4th-windiest month. For the whole year in context, see Villa Mercedes's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
17°
10th coldest
Rainfall
97 mm
11.8 wet days
Daylight
14 h 12 min
6:11 AM – 8:25 PM
Cloud cover
39%
2nd clearest
Wind
13 km/h
4th windiest
Solar energy
7.49 kWh/m²
Travel score
5.4
out of 10

Villa Mercedes is city in San Luis, Argentina.

Founded
1856

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 30°C by the end.

A typical December day in Villa Mercedes reaches about 29°C in the afternoon and slips back to 17°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 35°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12816
22816
32816
42816
52816
62816
72916
82916
92916
102917
112917
122917
132917
142917
153017
163017
173017
183017
193017
203018
213018
223018
233018
243018
253018
263018
273018
283018
293018
303018
313018

Villa Mercedes weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 18°8611.6145.0
Feb29° / 17°799.413.35.7
Mar27° / 15°879.412.36.9
Apr23° / 12°677.211.27.5
May19° / 294.610.37.0
Jun17° / 112.59.86.4
Jul16° / 112.5106.3
Aug19° / 21310.77.5
Sep21° / 365.611.87.5
Oct24° / 12°839.612.87.2
Nov27° / 15°8611.313.76.6
Dec29° / 17°9711.814.25.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 23% of December, with mostly cloudy or overcast conditions the remaining 23%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27525
37525
47525
57525
67525
77525
87624
97624
107624
117723
127723
137723
147822
157822
167822
177921
187921
197921
207921
217921
227921
237822
247822
257822
267822
277723
287624
297624
307624
317525

Chance of precipitation in December

Any precipitation

Villa Mercedes gets around 97 mm of rain over 11.8 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
240
340
440
539
639
738
838
938
1038
1138
1238
1338
1438
1538
1638
1738
1838
1938
2038
2138
2238
2338
2438
2538
2638
2738
2838
2938
3038
3139

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15528152
25627152
35527162
45527162
55427172
65327173
75227183
85127193
95127193
105027203
114927213
124827214
134827224
144727224
154627235
164527235
174327246
184227247
194127248
203927259
2138272510
2237272511
2336272511
2434272612
2533272613
2632272614
2731272615
2830272716
2929272716
3029272717
3128262818

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 12 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 6:09 AM to 6:19 AM, and sunset from 8:14 PM to 8:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.16:098:14
214.16:098:15
314.16:098:15
414.16:098:16
514.16:098:17
614.16:098:18
714.26:098:19
814.26:098:19
914.26:108:20
1014.26:108:21
1114.26:108:22
1214.26:108:22
1314.26:108:23
1414.26:118:24
1514.26:118:24
1614.26:118:25
1714.26:128:25
1814.26:128:26
1914.26:128:26
2014.26:138:27
2114.26:138:27
2214.26:148:28
2314.26:148:28
2414.26:158:29
2514.26:158:29
2614.26:168:30
2714.26:168:30
2814.26:178:30
2914.26:178:31
3014.26:188:31
3114.26:198:31

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.49 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.71 kWh/m² to a high of 7.49 kWh/m² in December across the year — December's 7.49 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.3Intense
57.3Intense
67.3Intense
77.4Intense
87.4Intense
97.4Intense
107.4Intense
117.5Intense
127.5Intense
137.5Intense
147.5Intense
157.5Intense
167.5Intense
177.5Intense
187.6Intense
197.6Intense
207.6Intense
217.6Intense
227.6Intense
237.5Intense
247.5Intense
257.5Intense
267.5Intense
277.5Intense
287.5Intense
297.5Intense
307.4Intense
317.4Intense
Planning a trip in December

Hazard calendar for Villa Mercedes

In seasonPeak

In December, Villa Mercedes sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Villa Mercedes's rainy season runs October–April, 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 Villa Mercedes?

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

5.4
Sightseeing
11th-best month of the year
6.9
Beach & pool
2nd-best month of the year

December is a reasonable time to visit Villa Mercedes for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Villa Mercedes in December

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

In December, Villa Mercedes sees daytime highs around 29°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Villa Mercedes 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 Villa Mercedes peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateHighVery highExtremeJan 17UV 14Jun 21UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Villa Mercedes?

Villa Mercedes sits at 33.7°S, 65.5°W, 516 m above sea level, in Argentina. The nearest listed city is San Luis, 91 km away.

Alta GraciaVilla Nueva

Topography around Villa Mercedes

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

Within 3 km, the terrain around Villa Mercedes has only modest variations in elevation — a maximum elevation change of 30 m around an average of 514 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 204 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,418 m.

The land around Villa Mercedes is covered by artificial surfaces (58%) and grassland (27%) within 3 km, cropland (52%) and grassland (24%) within 16 km, and cropland (59%) and grassland (31%) within 80 km.

3 km
30 m
16 km
204 m
80 km
1,418 m
treesshrubsgrasslandcroplandartificial surfaces
December weather nearby: San Luis 91 km · Río Cuarto 119 km · Embalse 191 km · Villa Dolores 194 km · Laboulaye 197 km · Río Tercero 209 km · Alta Gracia 245 km · Villa Nueva 248 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus 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 Villa Mercedes (-33.6757°, -65.4578°, elevation 516 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. 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).