San Rafael weather in December

In December, San Rafael sees average daytime highs of 31°C and overnight lows near 17°C, with 53 mm of rain across 8.7 wet days and about 14.3 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 32°C by the end. The sky is clear or mostly clear about 70% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 12 min at the start of December to 14 h 18 min by month's end. Set against the rest of the year, December is San Rafael's 1st-clearest and 1st-windiest month. For the whole year in context, see San Rafael's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
17°
10th coldest
Rainfall
53 mm
8.7 wet days
Daylight
14 h 18 min
6:20 AM – 8:39 PM
Cloud cover
32%
1st clearest
Wind
12 km/h
1st windiest
Solar energy
8.03 kWh/m²
Travel score
5.2
out of 10

San Rafael is city in Mendoza Province, Argentina.

Founded
1805

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 29°C in the first days to 32°C by the end.

A typical December day in San Rafael reaches about 31°C in the afternoon and slips back to 17°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 36°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12915
22915
32915
42916
52916
62916
73016
83016
93016
103016
113016
123016
133016
143117
153117
163117
173117
183117
193117
203117
213117
223117
233218
243218
253218
263218
273218
283218
293218
303218
313218

How December really feels in San Rafael

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.

San Rafael weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 18°468.9014.14.6
Feb30° / 17°477.1013.35.6
Mar27° / 15°486.8012.37.2
Apr22° / 10°426011.27.7
May18° / 315010.26.6
Jun15° / 183.70.19.75.6
Jul15° / 173.20.69.95.5
Aug18° / 223.40.310.76.9
Sep21° / 284.70.211.87.5
Oct24° / 11°607.6012.97.7
Nov28° / 14°538013.86.8
Dec31° / 17°538.7014.35.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17921
27921
37921
47921
57921
67921
78020
88119
98119
108218
118317
128317
138515
148515
158614
168713
178713
188812
198812
208812
218911
228812
238812
248812
258812
268812
278713
288713
298713
308713
318713

Chance of precipitation in December

Any precipitation

San Rafael gets around 53 mm of rain over 8.7 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 27% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
329
429
529
629
729
829
928
1028
1127
1227
1326
1426
1525
1625
1725
1824
1924
2024
2125
2225
2326
2426
2527
2627
2728
2828
2929
3029
3129

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 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1871210
2871210
3851320
4851320
5851320
6841420
7831430
8831430
9831430
10811540
11811540
12811540
13801550
14801550
15791650
16791650
17791650
18781750
19771760
20761860
21751960
22741961
23732061
24712171
25702271
26692281
27682381
28672391
296623101
306623101
316424111

Wind in December

Winds average 12 km/h in December, the windiest month of the year.

Across December, 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 December

DaylightNight

Daylight runs from about 14 h 12 min at the start of December to 14 h 18 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 6:19 AM to 6:28 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)
114.26:198:28
214.26:188:28
314.26:188:29
414.26:188:30
514.26:188:31
614.26:188:32
714.26:188:32
814.26:198:33
914.36:198:34
1014.36:198:35
1114.36:198:35
1214.36:198:36
1314.36:198:37
1414.36:208:37
1514.36:208:38
1614.36:208:39
1714.36:218:39
1814.36:218:40
1914.36:218:40
2014.36:228:41
2114.36:228:41
2214.36:238:42
2314.36:238:42
2414.36:248:43
2514.36:248:43
2614.36:258:44
2714.36:258:44
2814.36:268:44
2914.36:278:45
3014.36:278:45
3114.36:288:45

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.03 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.7 kWh/m² to a high of 8.03 kWh/m² in December across the year — December's 8.03 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.8Intense
27.8Intense
37.8Intense
47.8Intense
57.9Intense
67.9Intense
77.9Intense
87.9Intense
97.9Intense
108.0Intense
118.0Intense
128.0Intense
138.0Intense
148.0Intense
158.1Intense
168.1Intense
178.1Intense
188.1Intense
198.1Intense
208.1Intense
218.1Intense
228.1Intense
238.1Intense
248.1Intense
258.1Intense
268.1Intense
278.1Intense
288.1Intense
298.0Intense
308.0Intense
318.0Intense
Planning a trip in December

Is December a good time to visit San Rafael?

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

5.2
Sightseeing
11th-best month of the year
7.4
Beach & pool
3rd-best month of the year

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

What to pack for San Rafael in December

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

In December, San Rafael sees daytime highs around 31°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in San Rafael in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 San Rafael peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateHighVery highExtremeJan 17UV 14Jun 22UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Extreme
Apr5High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is San Rafael?

San Rafael sits at 34.6°S, 68.3°W, 690 m above sea level, in Argentina. The nearest listed city is General Alvear, 71 km away.

Topography around San Rafael

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

Within 3 km, the terrain around San Rafael has only modest variations in elevation — a maximum elevation change of 61 m around an average of 696 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 276 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,885 m.

The land around San Rafael is covered by artificial surfaces (59%) and grassland (27%) within 3 km, grassland (54%) and shrubs (33%) within 16 km, and shrubs (62%) and grassland (32%) within 80 km.

3 km
61 m
16 km
276 m
80 km
1,885 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: General Alvear 71 km · Tunuyán 131 km · Malargüe 149 km · Tupungato 158 km · Rivadavia 159 km · San Martín 171 km · Perdriel 179 km · Rodeo del Medio 183 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 Rafael (-34.6153°, -68.3324°, elevation 690 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).