Rivera weather in December

In December, Rivera sees average daytime highs of 29°C and overnight lows near 17°C, with 117 mm of rain across 9.6 wet days and about 14 hours of daylight. It is the 2nd-warmest and 8th-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 45% of the time in December, and the air most often feels humid.

Daylight stretches from about 13 h 54 min at the start of December to 14 hours by month's end. Set against the rest of the year, December is Rivera's 2nd-clearest and 6th-windiest month. For the whole year in context, see Rivera's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
17°
10th coldest
Rainfall
117 mm
9.6 wet days
Daylight
14 hours
6:39 AM – 8:38 PM
Cloud cover
50%
2nd clearest
Wind
13 km/h
6th windiest
Solar energy
7.02 kWh/m²
Travel score
5.7
out of 10

Rivera is city in Uruguay.

Density
2,125/km²
people per km²
Founded
1867

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 Rivera 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
82917
92917
102917
112917
122917
132917
142917
152917
162917
172918
182918
192918
202918
212918
222918
233018
243018
253018
263018
273018
283019
293019
303019
313019

Rivera weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°13410.613.85.0
Feb29° / 19°12610.413.15.4
Mar28° / 17°1079.212.26.4
Apr24° / 14°143911.37.1
May20° / 11°1108.310.56.5
Jun18° / 1248.7105.9
Jul17° / 1088.110.25.8
Aug19° / 1058.310.96.5
Sep21° / 11°1319.511.86.5
Oct23° / 13°1611112.86.7
Nov26° / 15°1188.313.67.0
Dec29° / 17°1179.6145.7

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 13% of December, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
35941
45941
56040
65941
75941
85941
95941
105941
115941
125941
135941
145941
155743
165743
175743
185644
195644
205644
215644
225644
235545
245545
255545
265545
275545
285545
295644
305644
315644

Chance of precipitation in December

Any precipitation

Rivera gets around 117 mm of rain over 9.6 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 31% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
328
428
528
629
729
829
929
1029
1129
1230
1330
1431
1531
1632
1732
1833
1933
2033
2133
2233
2333
2433
2533
2633
2733
2832
2932
3032
3132

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 27% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12827271620
22827271720
32727271720
42727271720
52727271720
62626271830
72526271830
82526271930
92426271930
102326281940
112226282040
122126282140
132026282140
141926282250
151825292350
161724292460
171724292560
181623292570
191522292680
201521292690
2114212827100
2213202828110
2313192828120
2413192728121
2512182729131
2612182629141
2712182629151
2811182629161
2911182529161
3011182529171
3110182529181

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 13 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
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 54 min at the start of December to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:36 AM to 6:46 AM, and sunset from 8:28 PM to 8:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.96:368:28
213.96:368:29
313.96:368:29
413.96:368:30
513.96:368:31
613.96:368:32
713.96:368:32
813.96:378:33
913.96:378:34
1014.06:378:34
1114.06:378:35
1214.06:378:36
1314.06:388:36
1414.06:388:37
1514.06:388:38
1614.06:398:38
1714.06:398:39
1814.06:398:39
1914.06:408:40
2014.06:408:40
2114.06:418:41
2214.06:418:41
2314.06:418:42
2414.06:428:42
2514.06:438:43
2614.06:438:43
2714.06:448:43
2814.06:448:44
2914.06:458:44
3014.06:458:44
3114.06:468:45

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.02 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.37 kWh/m² to a high of 7.02 kWh/m² in December across the year — December's 7.02 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.0Intense
27.1Intense
37.1Intense
47.1Intense
57.1Intense
67.1Intense
77.1Intense
87.1Intense
97.1Intense
107.1Intense
117.1Intense
127.1Intense
137.1Intense
147.0Intense
157.0Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
207.0Intense
216.9Intense
226.9Intense
236.9Intense
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 Rivera?

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

5.7
Sightseeing
10th-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for Rivera in December

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

In December, Rivera sees daytime highs around 29°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Rivera 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 Rivera peaks around January 18 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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 18UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr7Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep7Very high
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Rivera?

Rivera sits at 30.9°S, 55.6°W, 194 m above sea level, in Uruguay. The nearest listed city is Sant'Ana do Livramento, 2.0 km away.

Dom PedritoRosário do SulTacuarembóQuaraíArtigasSão Gabriel

Topography around Rivera

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

Within 3 km, the terrain around Rivera has only modest variations in elevation — a maximum elevation change of 88 m around an average of 207 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 239 m; within 80 km, significant variations in elevation — a maximum elevation change of 409 m.

The land around Rivera is covered by artificial surfaces (50%), trees (25%) and grassland (25%) within 3 km, grassland (57%) and trees (36%) within 16 km, and grassland (69%) within 80 km.

3 km
88 m
16 km
239 m
80 km
409 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Sant'Ana do Livramento 2.0 km · Dom Pedrito 84 km · Rosário do Sul 94 km · Tacuarembó 99 km · Quaraí 104 km · Artigas 104 km · Alegrete 127 km · São Gabriel 134 km

Uruguay travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / I / L
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$25,216
2025
Happiness
6.6 / 10
World Happiness, 2025
Homicide rate
11.2
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 542
Religion
none 47%Roman Catholic 37%Protestant 15%atheist 10%

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 Rivera (-30.9053°, -55.5508°, elevation 194 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).