San Antonio de Areco weather in December

In December, San Antonio de Areco sees average daytime highs of 28°C and overnight lows near 17°C, with 98 mm of rain across 8.9 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 52% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 18 min by month's end. Set against the rest of the year, December is San Antonio de Areco's 2nd-clearest and 6th-windiest month. For the whole year in context, see San Antonio de Areco's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
17°
10th coldest
Rainfall
98 mm
8.9 wet days
Daylight
14 h 18 min
5:46 AM – 8:02 PM
Cloud cover
43%
2nd clearest
Wind
13 km/h
6th windiest
Solar energy
7.41 kWh/m²
Travel score
6.3
out of 10

San Antonio de Areco is town in Buenos Aires Province, Argentina.

Founded
1730

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 27°C in the first days to 29°C by the end.

A typical December day in San Antonio de Areco reaches about 28°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 23°C and 33°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12715
22715
32715
42715
52715
62816
72816
82816
92816
102816
112816
122816
132816
142816
152816
162817
172917
182917
192917
202917
212917
222917
232917
242917
252918
262918
272918
282918
292918
302918
312918

San Antonio de Areco weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°928.1145.7
Feb28° / 17°1058.213.36.3
Mar26° / 16°937.112.37.3
Apr23° / 12°100811.27.3
May19° / 645.810.26.6
Jun16° / 495.79.85.4
Jul15° / 515.79.95.1
Aug17° / 595.510.76.3
Sep19° / 706.211.86.8
Oct22° / 12°1259.512.96.9
Nov26° / 14°1007.913.87.2
Dec28° / 17°988.914.26.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 35%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36436
46436
56535
66535
76535
86436
96436
106535
116535
126535
136535
146535
156535
166535
176535
186634
196634
206634
216634
226634
236634
246634
256634
266634
276634
286535
296535
306535
316535

Chance of precipitation in December

Any precipitation

San Antonio de Areco gets around 98 mm of rain over 8.9 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
227
327
427
527
628
728
828
928
1028
1128
1229
1329
1429
1530
1630
1730
1831
1931
2030
2130
2230
2330
2430
2530
2629
2729
2829
2928
3028
3128

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
140282480
240282480
339282480
439282480
538282581
638282581
737282691
836282691
935282791
1034292791
1133292891
1232292991
1331293091
14302930101
15292831112
16282831112
17272732122
18252732142
19242732152
20232632163
21222632183
22212531193
23202531213
24192430224
25192430234
26182330255
27172329265
28172229275
29162229276
30152229286
31152128296

Wind in December

Winds average 13 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
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
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 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 12 minutes over December. Sunrise moves from 5:44 AM to 5:53 AM, and sunset from 7:51 PM to 8:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:447:51
214.15:447:52
314.25:447:53
414.25:447:54
514.25:447:55
614.25:447:55
714.25:447:56
814.25:447:57
914.25:447:58
1014.25:447:58
1114.25:447:59
1214.35:458:00
1314.35:458:00
1414.35:458:01
1514.35:458:02
1614.35:468:02
1714.35:468:03
1814.35:468:03
1914.35:478:04
2014.35:478:05
2114.35:488:05
2214.35:488:06
2314.35:498:06
2414.35:498:06
2514.35:508:07
2614.35:508:07
2714.35:518:08
2814.35:518:08
2914.35:528:08
3014.35:538:09
3114.35:538:09

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.41 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 7.41 kWh/m² in December across the year — December's 7.41 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.4Intense
57.4Intense
67.4Intense
77.4Intense
87.4Intense
97.4Intense
107.4Intense
117.4Intense
127.4Intense
137.4Intense
147.4Intense
157.4Intense
167.4Intense
177.4Intense
187.4Intense
197.4Intense
207.4Intense
217.4Intense
227.4Intense
237.4Intense
247.3Intense
257.3Intense
267.3Intense
277.3Intense
287.3Intense
297.3Intense
307.3Intense
317.3Intense
Planning a trip in December

Is December a good time to visit San Antonio de Areco?

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

6.3
Sightseeing
7th-best month of the year
7.3
Beach & pool
2nd-best month of the year

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

What to pack for San Antonio de Areco in December

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

In December, San Antonio de Areco sees daytime highs around 28°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in San Antonio de Areco 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 San Antonio de Areco peaks around January 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 14UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in San Antonio de Areco 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 San Antonio de Areco is worst in August — around 20 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodAug 1619 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb11Good
Mar12Moderate
Apr11Good
May14Moderate
Jun16Moderate
Jul16Moderate
Aug20Moderate
Sep15Moderate
Oct13Moderate
Nov10Good
Dec11Good
Location & terrain

Where is San Antonio de Areco?

San Antonio de Areco sits at 34.3°S, 59.5°W, 35 m above sea level, in Argentina. The nearest listed city is Carmen de Areco, 35 km away.

Topography around San Antonio de Areco

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Antonio de Areco.

Within 3 km, the terrain around San Antonio de Areco has only modest variations in elevation — a maximum elevation change of 24 m around an average of 29 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 58 m; within 80 km, only modest variations in elevation — a maximum elevation change of 94 m.

The land around San Antonio de Areco is covered by grassland (41%) and cropland (30%) within 3 km, cropland (81%) within 16 km, and cropland (54%) and grassland (20%) within 80 km.

3 km
24 m
16 km
58 m
80 km
94 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Carmen de Areco 35 km · Zárate 44 km · Mercedes 45 km · Luján 48 km · Campana 48 km · Baradero 49 km · Pilar 56 km · Arrecifes 62 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 San Antonio de Areco (-34.2508°, -59.4694°, elevation 35 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. 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).