Mercedes weather in December

In December, Mercedes sees average daytime highs of 30°C and overnight lows near 19°C, with 148 mm of rain across 9.9 wet days and about 13.8 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 31°C by the end. The sky is clear or mostly clear about 45% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 42 min at the start of December to 13 h 48 min by month's end. Set against the rest of the year, December is Mercedes's 7th-clearest and 7th-windiest month. For the whole year in context, see Mercedes's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
148 mm
9.9 wet days
Daylight
13 h 54 min
5:53 AM – 7:44 PM
Cloud cover
49%
7th clearest
Wind
12 km/h
7th windiest
Solar energy
6.97 kWh/m²
Travel score
5.0
out of 10

Mercedes is Cuidad de Mercedes Corrientes,Argentina.

Founded
1829

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 29°C in the first days to 31°C by the end.

A typical December day in Mercedes reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12918
22918
32918
42918
53019
63019
73019
83019
93019
103019
113019
123019
133019
143019
153019
163019
173020
183120
193120
203120
213120
223120
233120
243120
253120
263120
273120
283121
293121
303121
313121

How December really feels in Mercedes

Once humidity and wind are folded in, December averages 8 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
8
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Mercedes weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°14811.413.74.4
Feb31° / 20°11810.3134.7
Mar29° / 19°1329.912.25.7
Apr26° / 16°1739.511.37.0
May22° / 13°1027.810.67.0
Jun20° / 11°957.810.26.5
Jul19° / 847.210.36.8
Aug22° / 11°797.1117.3
Sep23° / 13°1228.611.87.3
Oct26° / 15°19010.712.76.7
Nov28° / 17°1428.713.56.4
Dec30° / 19°1489.913.85.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% 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 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26238
36139
46139
56139
66139
76139
86139
96139
106139
116139
126139
136139
146040
156139
166040
176040
186040
196040
205842
215842
225842
235842
245842
255743
265743
275743
285743
295842
305743
315743

Chance of precipitation in December

Any precipitation

Mercedes gets around 148 mm of rain over 9.9 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 32% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
131
231
331
430
530
630
730
829
929
1029
1129
1229
1330
1430
1531
1632
1732
1833
1933
2034
2134
2234
2334
2435
2535
2635
2735
2835
2935
3034
3134

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11422272981
21322272991
31322272991
41322262991
513222629101
613212629101
713212629111
812212529111
912212529121
1012212430121
1111212430131
1211222331131
1310212331141
1410212232141
1510212232151
169202133161
179202133161
188192133172
198192033192
208182033202
217182032212
227171932223
236171931243
246161931253
255161930264
265151930274
275151929284
285141928294
295141927305
305131927315
314131927325

Wind in December

Winds average 12 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 42 min at the start of December to 13 h 48 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 5:50 AM to 6:00 AM, and sunset from 7:34 PM to 7:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:507:34
213.75:507:35
313.85:507:36
413.85:507:36
513.85:507:37
613.85:507:38
713.85:517:38
813.85:517:39
913.85:517:40
1013.85:517:40
1113.85:517:41
1213.85:527:42
1313.85:527:42
1413.85:527:43
1513.95:527:44
1613.95:537:44
1713.95:537:45
1813.95:537:45
1913.95:547:46
2013.95:547:46
2113.95:557:47
2213.95:557:47
2313.95:567:48
2413.95:567:48
2513.95:577:49
2613.95:577:49
2713.95:587:49
2813.95:587:50
2913.95:597:50
3013.86:007:50
3113.86:007:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.97 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 6.97 kWh/m² in December across the year — December's 6.97 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
57.0Intense
67.0Intense
77.0Intense
87.0Intense
97.0Intense
107.0Intense
117.0Intense
127.0Intense
137.0Intense
147.0Intense
157.0Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
237.0Intense
246.9Intense
256.9Intense
266.9Intense
276.9Intense
286.9Intense
296.9Intense
306.9Intense
316.9Intense
Planning a trip in December

Is December a good time to visit Mercedes?

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

5.0
Sightseeing
10th-best month of the year
7.0
Beach & pool
3rd-best month of the year

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

What to pack for Mercedes in December

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

In December, Mercedes sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Mercedes 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 Mercedes peaks around January 24 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 24UV 14Jun 22UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5High
Sep7Very high
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Mercedes?

Mercedes sits at 29.2°S, 58.1°W, 96 m above sea level, in Argentina. The nearest listed city is Curuzú Cuatiá, 68 km away.

Topography around Mercedes

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

Within 3 km, the terrain around Mercedes has only modest variations in elevation — a maximum elevation change of 38 m around an average of 90 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, only modest variations in elevation — a maximum elevation change of 103 m.

The land around Mercedes is covered by grassland (70%) within 3 km, grassland (90%) within 16 km, and grassland (72%) within 80 km.

3 km
38 m
16 km
75 m
80 km
103 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Curuzú Cuatiá 68 km · Paso de los Libres 112 km · Uruguaiana 115 km · Goya 115 km · Saladas 116 km · Monte Caseros 126 km · San Lorenzo 135 km · Villa Ocampo 147 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 Mercedes (-29.1842°, -58.0752°, elevation 96 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).