Uruguaiana weather in December

In December, Uruguaiana sees average daytime highs of 31°C and overnight lows near 20°C, with 135 mm of rain across 9.3 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 30°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 48 min at the start of December to 13 h 54 min by month's end. Set against the rest of the year, December is Uruguaiana's 5th-clearest and 7th-windiest month. For the whole year in context, see Uruguaiana's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
20°
10th coldest
Rainfall
135 mm
9.3 wet days
Daylight
13 h 54 min
6:47 AM – 8:42 PM
Cloud cover
48%
5th clearest
Wind
13 km/h
7th windiest
Solar energy
6.99 kWh/m²
Travel score
4.9
out of 10

Uruguaiana is human settlement in Brazil.

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 30°C in the first days to 31°C by the end.

A typical December day in Uruguaiana reaches about 31°C in the afternoon and slips back to 20°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)
13019
23019
33019
43019
53019
63019
73019
83019
93019
103019
113019
123019
133119
143120
153120
163120
173120
183120
193120
203120
213120
223120
233120
243120
253121
263121
273121
283121
293221
303221
313221

How December really feels in Uruguaiana

Once humidity and wind are folded in, December averages 9 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
9
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.

Uruguaiana 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
Jan32° / 21°13910.413.74.3
Feb31° / 21°12710.313.14.7
Mar29° / 19°1249.212.25.8
Apr26° / 16°1779.511.37.0
May22° / 13°1157.810.57.0
Jun19° / 11°1138.510.16.4
Jul19° / 10°1037.510.36.6
Aug21° / 11°897.910.97.1
Sep23° / 13°1268.911.87.1
Oct26° / 15°18910.712.76.7
Nov28° / 17°1368.413.56.3
Dec31° / 20°1359.313.94.9

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 14% of December, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
66040
76040
86040
95941
106040
116040
126040
136040
146040
156040
166040
176040
185941
195941
205941
215941
225941
235842
245842
255941
265941
275941
285941
295941
305941
316040

Chance of precipitation in December

Any precipitation

Uruguaiana gets around 135 mm of rain over 9.3 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 30% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
328
428
528
628
728
828
927
1027
1128
1228
1328
1429
1529
1630
1731
1831
1932
2032
2132
2232
2333
2433
2533
2632
2732
2832
2932
3031
3131

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 47% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11525272670
21525272670
31425272670
41425272680
51425272680
61424272690
71324272690
813242727100
913232627110
1012232627110
1112232628120
1211222628120
1311222629130
1411212629130
1510202530140
1610192530151
179182531161
189182431171
199172431181
208162431192
218162331202
227162331212
237152230233
247152230243
257152130253
266152129264
276142029274
286142028274
296142028284
306142028294
316141928295

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.

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
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 December

DaylightNight

Daylight runs from about 13 h 48 min at the start of December to 13 h 54 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 6:45 AM to 6:55 AM, and sunset from 8:31 PM to 8:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.86:458:31
213.86:458:32
313.86:458:33
413.86:458:34
513.86:458:34
613.86:458:35
713.86:458:36
813.96:458:36
913.96:468:37
1013.96:468:38
1113.96:468:38
1213.96:468:39
1313.96:478:40
1413.96:478:40
1513.96:478:41
1613.96:478:42
1713.96:488:42
1813.96:488:43
1913.96:498:43
2013.96:498:44
2113.96:498:44
2213.96:508:45
2313.96:508:45
2413.96:518:46
2513.96:518:46
2613.96:528:46
2713.96:538:47
2813.96:538:47
2913.96:548:48
3013.96:548:48
3113.96:558:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.99 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 6.99 kWh/m² in December across the year — December's 6.99 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.0Intense
27.0Intense
37.0Intense
47.0Intense
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
297.0Intense
307.0Intense
317.0Intense
Planning a trip in December

Is December a good time to visit Uruguaiana?

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

4.9
Sightseeing
10th-best month of the year
7.0
Beach & pool
3rd-best month of the year

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

What to pack for Uruguaiana in December

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

In December, Uruguaiana sees daytime highs around 31°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Uruguaiana 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 Uruguaiana peaks around January 24 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 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 highVery highExtremeJan 24UV 13Jun 21UV 4
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep7Very high
Oct7High
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Uruguaiana?

Uruguaiana sits at 29.8°S, 57.1°W, 79 m above sea level, in Brazil. The nearest listed city is Paso de los Libres, 5.0 km away.

Topography around Uruguaiana

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

Within 3 km, the terrain around Uruguaiana has only modest variations in elevation — a maximum elevation change of 40 m around an average of 55 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, significant variations in elevation — a maximum elevation change of 255 m.

The land around Uruguaiana is covered by artificial surfaces (36%) and water (25%) within 3 km, grassland (40%) within 16 km, and grassland (66%) within 80 km.

3 km
40 m
16 km
96 m
80 km
255 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Paso de los Libres 5.0 km · Monte Caseros 76 km · Itaqui 87 km · Curuzú Cuatiá 93 km · Quaraí 93 km · Artigas 94 km · Mercedes 115 km · Alegrete 125 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Uruguaiana (-29.7547°, -57.0883°, elevation 79 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).