Gualeguaychú weather in January

In January, Gualeguaychú sees average daytime highs of 30°C and overnight lows near 19°C, with 110 mm of rain across 7.7 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 50% of the time in January, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of January to 13 h 36 min by month's end. Set against the rest of the year, January is Gualeguaychú's 1st-clearest and 8th-windiest month. For the whole year in context, see Gualeguaychú's year-round climate.

Daytime high
30°
1st warmest
Overnight low
19°
12th coldest
Rainfall
110 mm
7.7 wet days
Daylight
14 hours
6:05 AM – 8:02 PM
Cloud cover
43%
1st clearest
Wind
12 km/h
8th windiest
Solar energy
7.22 kWh/m²
Travel score
5.3
out of 10

Gualeguaychú is city in Gualeguaychú Department, Entre Ríos Province, Argentina.

Founded
1783

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical January day in Gualeguaychú 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, January runs about 1°C warmer than December and about 1°C warmer than February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13019
23019
33019
43019
53019
63019
73019
83019
93019
103019
113019
123019
133019
143019
153019
163019
173019
183019
193019
203019
213019
223020
233020
243020
253020
263020
273020
283020
293020
303019
313019

Gualeguaychú weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°1107.713.95.3
Feb29° / 19°115813.25.8
Mar27° / 17°121812.37.0
Apr23° / 14°1307.911.27.3
May20° / 11°806.110.36.8
Jun17° / 696.59.95.8
Jul16° / 646105.6
Aug18° / 876.510.86.6
Sep20° / 10°87711.86.9
Oct23° / 13°1249.812.87.0
Nov26° / 15°1046.913.77.2
Dec29° / 18°1288.614.15.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 35%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46337
56337
66436
76436
86436
96436
106436
116535
126436
136535
146535
156535
166634
176634
186634
196634
206733
216634
226634
236733
246634
256535
266634
276535
286436
296337
306238
316139

Chance of precipitation in January

Any precipitation

Gualeguaychú gets around 110 mm of rain over 7.7 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
227
326
426
526
626
726
825
925
1025
1125
1224
1324
1423
1523
1623
1723
1823
1923
2023
2123
2223
2324
2424
2525
2625
2726
2827
2927
3028
3129

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
112192429141
212192429151
312182429151
412182530151
512182530151
612172530151
712172630141
812172630141
912172730140
1012172730140
1112172730130
1212172830130
1312172830120
1411172831120
1511182931120
1611182931110
1711182932110
1811182932110
1910182832110
2010182832110
2110192733111
229192733111
239192634111
249192535111
258192535121
268192436121
278192436131
288182337131
298182337131
308182236141
318192236141

Wind in January

Winds average 12 km/h in January.

Across January, 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
712light breeze
812light 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
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 06 min at the start of January to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over January. Sunrise moves from 5:53 AM to 6:18 AM, and sunset from 8:02 PM to 7:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:538:02
214.15:548:02
314.15:548:02
414.15:558:02
514.15:568:02
614.15:568:02
714.15:578:02
814.15:588:03
914.15:598:03
1014.06:008:03
1114.06:008:03
1214.06:018:03
1314.06:028:02
1414.06:038:02
1514.06:048:02
1614.06:058:02
1713.96:068:02
1813.96:068:02
1913.96:078:01
2013.96:088:01
2113.96:098:01
2213.86:108:01
2313.86:118:00
2413.86:128:00
2513.86:137:59
2613.86:147:59
2713.76:157:59
2813.76:167:58
2913.76:177:58
3013.76:177:57
3113.66:187:56

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.22 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 7.34 kWh/m² in December across the year — January's 7.22 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
77.3Intense
87.3Intense
97.3Intense
107.3Intense
117.3Intense
127.3Intense
137.3Intense
147.3Intense
157.3Intense
167.3Intense
177.3Intense
187.3Intense
197.3Intense
207.2Intense
217.2Intense
227.2Intense
237.1Intense
247.1Intense
257.1Intense
267.0Intense
277.0Intense
286.9Intense
296.9Intense
306.8Intense
316.8Intense
Planning a trip in January

Is January a good time to visit Gualeguaychú?

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

5.3
Sightseeing
12th-best month of the year
7.4
Beach & pool
1st-best month of the year

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

What to pack for Gualeguaychú in January

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

In January, Gualeguaychú sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Gualeguaychú in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Gualeguaychú peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 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 20UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Gualeguaychú?

Gualeguaychú sits at 33.0°S, 58.5°W, 19 m above sea level, in Argentina. The nearest listed city is Fray Bentos, 23 km away.

Topography around Gualeguaychú

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

Within 3 km, the terrain around Gualeguaychú has only modest variations in elevation — a maximum elevation change of 33 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, only modest variations in elevation — a maximum elevation change of 101 m.

The land around Gualeguaychú is covered by artificial surfaces (40%) and grassland (31%) within 3 km, grassland (40%) and cropland (31%) within 16 km, and cropland (43%) and grassland (30%) within 80 km.

3 km
33 m
16 km
52 m
80 km
101 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Fray Bentos 23 km · Mercedes 53 km · Concepción del Uruguay 64 km · Dolores 64 km · Gualeguay 75 km · Paysandú 87 km · Young 90 km · Colón 94 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 Gualeguaychú (-33.0078°, -58.5184°, elevation 19 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).