Río Colorado weather in December

In December, Río Colorado sees average daytime highs of 29°C and overnight lows near 15°C, with 39 mm of rain across 5.7 wet days and about 14.7 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 31°C by the end. The sky is clear or mostly clear about 62% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 30 min at the start of December to 14 h 42 min by month's end. Set against the rest of the year, December is Río Colorado's 3rd-clearest and 1st-windiest month. For the whole year in context, see Río Colorado's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
15°
10th coldest
Rainfall
39 mm
5.7 wet days
Daylight
14 h 42 min
5:51 AM – 8:34 PM
Cloud cover
34%
3rd clearest
Wind
16 km/h
1st windiest
Solar energy
8.08 kWh/m²
Travel score
6.4
out of 10

Río Colorado is human settlement in Pichi Mahuida, Río Negro, Argentina.

Founded
1901

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 31°C by the end.

A typical December day in Río Colorado reaches about 29°C in the afternoon and slips back to 15°C overnight — a 14°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 4°C warmer than November and about 2°C cooler than January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12714
22814
32814
42814
52814
62814
72814
82814
92815
102815
112915
122915
132915
142915
152915
162915
172916
183016
193016
203016
213016
223016
233016
243016
253017
263017
273017
283117
293117
303117
313117

How December really feels in Río Colorado

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Río Colorado weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 17°435.614.45.5
Feb29° / 16°525.613.56.4
Mar26° / 14°566.112.37.7
Apr21° / 10°475.2117.5
May17° / 294.59.96.1
Jun14° / 213.99.34.5
Jul13° / 193.79.54.3
Aug16° / 263.710.55.7
Sep19° / 384.811.76.8
Oct22° / 506.7137.3
Nov26° / 13°516.714.17.6
Dec29° / 15°395.714.76.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 23%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27525
37624
47624
57624
67525
77624
87624
97624
107525
117525
127624
137723
147723
157723
167822
177822
187822
197921
207921
217921
227921
237921
247921
258020
267921
277921
287921
297921
307921
317921

Chance of precipitation in December

Any precipitation

Río Colorado gets around 39 mm of rain over 5.7 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 18% and peaks near 20% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
120
220
320
420
520
620
720
820
920
1019
1119
1219
1318
1418
1517
1617
1717
1817
1917
2017
2117
2217
2317
2417
2517
2617
2717
2817
2917
3017
3117

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
188930
288930
388930
4861031
5861031
6851041
7841141
8841141
9841141
10841141
11841141
12841141
13831151
14831151
15831151
16831151
17821161
18821161
19821161
20811171
21811171
22801271
23801271
24781282
25771382
26771382
27751492
28751492
29741592
30741592
31731593

Wind in December

Winds average 16 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 16 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 30 min at the start of December to 14 h 42 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 5:50 AM to 5:58 AM, and sunset from 8:22 PM to 8:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.55:508:22
214.65:508:23
314.65:508:24
414.65:508:25
514.65:508:26
614.65:508:27
714.65:508:28
814.65:508:28
914.75:508:29
1014.75:508:30
1114.75:508:31
1214.75:508:31
1314.75:508:32
1414.75:508:33
1514.75:518:34
1614.75:518:34
1714.75:518:35
1814.75:528:35
1914.75:528:36
2014.75:528:37
2114.75:538:37
2214.75:538:38
2314.75:548:38
2414.75:548:38
2514.75:558:39
2614.75:558:39
2714.75:568:40
2814.75:568:40
2914.75:578:40
3014.75:588:40
3114.75:588:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.08 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.97 kWh/m² to a high of 8.08 kWh/m² in December across the year — December's 8.08 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.9Intense
27.9Intense
37.9Intense
47.9Intense
57.9Intense
67.9Intense
77.9Intense
88.0Intense
98.0Intense
108.0Intense
118.0Intense
128.0Intense
138.0Intense
148.0Intense
158.1Intense
168.1Intense
178.1Intense
188.1Intense
198.1Intense
208.1Intense
218.1Intense
228.2Intense
238.2Intense
248.2Intense
258.2Intense
268.2Intense
278.2Intense
288.2Intense
298.1Intense
308.1Intense
318.1Intense
Planning a trip in December

Is December a good time to visit Río Colorado?

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

6.4
Sightseeing
6th-best month of the year
7.9
Beach & pool
2nd-best month of the year

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

What to pack for Río Colorado in December

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

In December, Río Colorado sees daytime highs around 29°C and nights near 15°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Río Colorado 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 Río Colorado peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateLowModerateVery highExtremeDec 20UV 12Jun 22UV 2
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar8Very high
Apr5High
May3Moderate
Jun2Low
Jul2Low
Aug3Moderate
Sep5Moderate
Oct7Very high
Nov10Very high
Dec12Extreme
Location & terrain

Where is Río Colorado?

Río Colorado sits at 39.0°S, 64.1°W, 76 m above sea level, in Argentina. The nearest listed city is Bahía Blanca, 161 km away.

San Antonio OestePigüéCarmen de PatagonesViedmaCoronel Suárez

Topography around Río Colorado

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

Within 3 km, the terrain around Río Colorado has only modest variations in elevation — a maximum elevation change of 54 m around an average of 89 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 83 m; within 80 km, significant variations in elevation — a maximum elevation change of 359 m.

The land around Río Colorado is covered by grassland (46%) and shrubs (20%) within 3 km, shrubs (71%) and grassland (21%) within 16 km, and shrubs (79%) within 80 km.

3 km
54 m
16 km
83 m
80 km
359 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Bahía Blanca 161 km · Punta Alta 175 km · General Acha 185 km · San Antonio Oeste 207 km · Pigüé 213 km · Carmen de Patagones 223 km · Viedma 223 km · Coronel Suárez 254 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 Río Colorado (-38.9908°, -64.0957°, elevation 76 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).