San Antonio Oeste weather in December

In December, San Antonio Oeste sees average daytime highs of 26°C and overnight lows near 16°C, with 15 mm of rain across 3 wet days and about 14.9 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 60% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 42 min at the start of December to 14 h 54 min by month's end. Set against the rest of the year, December is San Antonio Oeste's 3rd-clearest and 1st-windiest month. For the whole year in context, see San Antonio Oeste's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
15 mm
3 wet days
Daylight
14 h 54 min
5:49 AM – 8:43 PM
Cloud cover
35%
3rd clearest
Wind
19 km/h
1st windiest
Solar energy
8.15 kWh/m²
Travel score
8.2
out of 10

San Antonio Oeste is city in Río Negro, Argentina.

Founded
1905

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 25°C in the first days to 27°C by the end.

A typical December day in San Antonio Oeste reaches about 26°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 31°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52515
62515
72516
82516
92516
102516
112616
122616
132616
142616
152616
162616
172616
182617
192617
202717
212717
222717
232717
242717
252717
262717
272717
282717
292718
302718
312718

San Antonio Oeste weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°193.314.68.0
Feb27° / 17°233.413.68.1
Mar24° / 15°303.712.38.3
Apr20° / 12°303.610.97.5
May16° / 274.79.85.7
Jun13° / 254.69.14.1
Jul12° / 2149.43.9
Aug14° / 183.210.45.0
Sep17° / 223.711.76.2
Oct20° / 11°284.413.17.3
Nov23° / 14°233.814.38.1
Dec26° / 16°15314.98.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27426
37525
47525
57525
67525
77426
87426
97426
107426
117426
127525
137525
147525
157525
167525
177525
187624
197723
207723
217723
227723
237822
247822
257822
267822
277921
287921
297921
307921
317921

Chance of precipitation in December

Any precipitation

San Antonio Oeste gets around 15 mm of rain over 3 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 11% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
111
210
310
410
510
610
710
810
910
1010
1110
129
139
149
159
169
178
188
198
208
218
229
239
249
259
2610
2710
2810
2911
3011
3111

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 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19640
29640
39640
49541
59541
69541
79451
89451
99451
109451
119451
129352
139352
149352
159352
169352
179262
189262
199262
209262
219073
229073
238983
248983
258794
2686104
2785114
2885114
2984115
3083125
3183125

Wind in December

Winds average 19 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 19 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 42 min at the start of December to 14 h 54 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 5:48 AM to 5:56 AM, and sunset from 8:31 PM to 8:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.75:488:31
214.75:488:32
314.75:488:33
414.85:488:34
514.85:488:34
614.85:488:35
714.85:488:36
814.85:488:37
914.85:488:38
1014.95:488:39
1114.95:488:40
1214.95:488:40
1314.95:488:41
1414.95:488:42
1514.95:498:42
1614.95:498:43
1714.95:498:44
1814.95:498:44
1914.95:508:45
2014.95:508:45
2114.95:518:46
2214.95:518:46
2314.95:528:47
2414.95:528:47
2514.95:538:48
2614.95:538:48
2714.95:548:48
2814.95:548:49
2914.95:558:49
3014.95:568:49
3114.95:568:49

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.15 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.81 kWh/m² to a high of 8.15 kWh/m² in December across the year — December's 8.15 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.0Intense
28.0Intense
38.0Intense
48.0Intense
58.0Intense
68.0Intense
78.0Intense
88.1Intense
98.1Intense
108.1Intense
118.1Intense
128.1Intense
138.1Intense
148.1Intense
158.1Intense
168.2Intense
178.2Intense
188.2Intense
198.2Intense
208.2Intense
218.2Intense
228.2Intense
238.2Intense
248.2Intense
258.2Intense
268.2Intense
278.2Intense
288.2Intense
298.2Intense
308.2Intense
318.2Intense
Planning a trip in December

Is December a good time to visit San Antonio Oeste?

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

8.2
Sightseeing
2nd-best month of the year
7.8
Beach & pool
3rd-best month of the year

December is one of the better times to visit San Antonio Oeste for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Antonio Oeste in December

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

In December, San Antonio Oeste sees daytime highs around 26°C and nights near 16°C. Pack sun protection. Worth having: light clothes. About 3 days see rain.

sun protectionlight clothes

Sea temperature near San Antonio Oeste in December

The nearest coast averages about 17°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 km away) is warmest in February at about 19°C and coldest in August near 11°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar18Cool
Apr16Cool
May15Bracing
Jun13Bracing
Jul12Bracing
Aug11Bracing
Sep11Bracing
Oct13Bracing
Nov15Bracing
Dec17Cool

UV index in San Antonio Oeste 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 San Antonio Oeste 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
Jan11Extreme
Feb11Extreme
Mar7Very high
Apr5Moderate
May3Moderate
Jun2Low
Jul2Low
Aug3Moderate
Sep4Moderate
Oct7High
Nov9Very high
Dec12Extreme
Location & terrain

Where is San Antonio Oeste?

San Antonio Oeste sits at 40.7°S, 64.9°W, 12 m above sea level, in Argentina. The nearest listed city is Viedma, 164 km away.

Río ColoradoPuerto MadrynVilla ReginaTrelewRawsonGeneral Roca

Topography around San Antonio Oeste

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

Within 3 km, the terrain around San Antonio Oeste has only modest variations in elevation — a maximum elevation change of 26 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 162 m; within 80 km, significant variations in elevation — a maximum elevation change of 389 m.

The land around San Antonio Oeste is covered by shrubs (40%) and water (23%) within 3 km, shrubs (53%) and water (34%) within 16 km, and shrubs (73%) and water (21%) within 80 km.

3 km
26 m
16 km
162 m
80 km
389 m
shrubsgrasslandartificial surfacesbare terrainwater
December weather nearby: Viedma 164 km · Carmen de Patagones 166 km · Río Colorado 207 km · Puerto Madryn 227 km · Villa Regina 257 km · Trelew 281 km · Rawson 286 km · General Roca 294 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 San Antonio Oeste (-40.7319°, -64.9477°, elevation 12 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).