Gualeguay weather in December

In December, Gualeguay sees average daytime highs of 29°C and overnight lows near 17°C, with 120 mm of rain across 9.1 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 2nd-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 50% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 hours at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Gualeguay's 2nd-clearest and 6th-windiest month. For the whole year in context, see Gualeguay's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
17°
10th coldest
Rainfall
120 mm
9.1 wet days
Daylight
14 h 12 min
5:48 AM – 7:59 PM
Cloud cover
44%
2nd clearest
Wind
12 km/h
6th windiest
Solar energy
7.33 kWh/m²
Travel score
5.8
out of 10

Gualeguay is city in Entre Ríos Province, Argentina.

Founded
1783

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 Gualeguay 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 34°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)
12816
22816
32816
42816
52816
62816
72817
82817
92917
102917
112917
122917
132917
142917
152917
162917
172918
182918
192918
202918
213018
223018
233018
243018
253018
263019
273019
283019
293019
303019
313019

Gualeguay weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°1077.413.95.3
Feb29° / 18°1108.113.25.8
Mar27° / 17°1227.812.37.0
Apr23° / 13°1118.211.27.3
May20° / 10°756.110.36.8
Jun17° / 576.49.95.8
Jul16° / 535.4105.7
Aug18° / 715.910.86.7
Sep21° / 10°786.811.87.0
Oct23° / 13°1199.812.87.1
Nov26° / 15°1097.413.77.1
Dec29° / 17°1209.114.15.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36337
46337
56436
66436
76535
86634
96634
106634
116733
126733
136733
146733
156634
166535
176535
186436
196436
206337
216337
226337
236238
246238
256238
266139
276139
286139
296238
306238
316238

Chance of precipitation in December

Any precipitation

Gualeguay gets around 120 mm of rain over 9.1 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 (%)
126
226
326
426
527
627
728
828
928
1029
1129
1229
1330
1430
1531
1631
1731
1831
1931
2031
2131
2231
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 28% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
13429261010
23429261010
33328271010
43328271020
53328271120
63227281120
73127291120
83127291220
93027301220
102927301220
112827301320
122727311320
132627311430
142527311530
152427311630
162327311730
172226301830
182126301940
192026302040
201925302250
211825292350
221724292460
231724282560
241623272670
251622272770
261522262880
271521262990
281521262990
2914202530100
3014202530111
3113202530111

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 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 hours 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 12 minutes over December. Sunrise moves from 5:46 AM to 5:56 AM, and sunset from 7:48 PM to 8:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:467:48
214.05:467:49
314.15:467:50
414.15:467:50
514.15:467:51
614.15:467:52
714.15:467:53
814.15:467:53
914.15:467:54
1014.15:477:55
1114.15:477:56
1214.25:477:56
1314.25:477:57
1414.25:477:58
1514.25:487:58
1614.25:487:59
1714.25:487:59
1814.25:498:00
1914.25:498:00
2014.25:508:01
2114.25:508:02
2214.25:508:02
2314.25:518:02
2414.25:518:03
2514.25:528:03
2614.25:538:04
2714.25:538:04
2814.25:548:04
2914.25:548:05
3014.25:558:05
3114.25:568:05

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.33 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 7.33 kWh/m² in December across the year — December's 7.33 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.3Intense
37.3Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.3Intense
97.3Intense
107.4Intense
117.4Intense
127.3Intense
137.3Intense
147.3Intense
157.3Intense
167.3Intense
177.3Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.3Intense
237.3Intense
247.3Intense
257.3Intense
267.3Intense
277.2Intense
287.2Intense
297.2Intense
307.2Intense
317.2Intense
Planning a trip in December

Is December a good time to visit Gualeguay?

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

5.8
Sightseeing
8th-best month of the year
7.3
Beach & pool
3rd-best month of the year

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

What to pack for Gualeguay in December

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

In December, Gualeguay sees daytime highs around 29°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 Gualeguay 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 Gualeguay peaks around January 15 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 15UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Gualeguay 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 Gualeguay is worst in August — around 19 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (April, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1718 µg/m³Apr 145 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb6Good
Mar6Good
Apr5Good
May7Good
Jun7Good
Jul12Good
Aug19Moderate
Sep12Good
Oct10Good
Nov6Good
Dec6Good
Location & terrain

Where is Gualeguay?

Gualeguay sits at 33.1°S, 59.3°W, 13 m above sea level, in Argentina. The nearest listed city is San Pedro, 68 km away.

Topography around Gualeguay

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

Within 3 km, the terrain around Gualeguay has only modest variations in elevation — a maximum elevation change of 24 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 59 m; within 80 km, only modest variations in elevation — a maximum elevation change of 95 m.

The land around Gualeguay is covered by grassland (60%) and artificial surfaces (23%) within 3 km, grassland (60%) and cropland (29%) within 16 km, and wetland (33%), cropland (32%) and grassland (29%) within 80 km.

3 km
24 m
16 km
59 m
80 km
95 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: San Pedro 68 km · Ramallo 75 km · Gualeguaychú 75 km · Baradero 77 km · San Nicolás de los Arroyos 86 km · Fray Bentos 93 km · Nogoyá 94 km · Villa Constitución 95 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 Gualeguay (-33.1409°, -59.3126°, elevation 13 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).