Tunuyán weather in December

In December, Tunuyán sees average daytime highs of 27°C and overnight lows near 13°C, with 75 mm of rain across 9.9 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 68% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Tunuyán's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Tunuyán's year-round climate.

Daytime high
27°
2nd warmest
Overnight low
13°
10th coldest
Rainfall
75 mm
9.9 wet days
Daylight
14 h 12 min
6:26 AM – 8:39 PM
Cloud cover
33%
2nd clearest
Wind
8 km/h
2nd windiest
Solar energy
8.35 kWh/m²
Travel score
6.9
out of 10

Tunuyán is city in Mendoza, Argentina.

Founded
1880

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 26°C in the first days to 28°C by the end.

A typical December day in Tunuyán reaches about 27°C in the afternoon and slips back to 13°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 31°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12512
22612
32612
42612
52612
62612
72612
82612
92612
102612
112613
122613
132713
142713
152713
162713
172713
182714
192714
202814
212814
222814
232814
242814
252814
262815
272815
282815
292815
302815
312815

How December really feels in Tunuyán

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.

Tunuyán 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 daysSnow daysDaylight (hours)Travel score
Jan28° / 15°6810.20146.6
Feb26° / 14°6810013.26.8
Mar24° / 12°8511.7012.36.9
Apr19° / 80110.111.26.3
May15° / 6710.50.510.34.5
Jun12° / 547.91.49.83.3
Jul11° / -0°497.62.3103.1
Aug14° / 567.81.910.84.4
Sep17° / 629.10.911.85.8
Oct21° / 8310.40.112.86.9
Nov24° / 10°7910.8013.77.2
Dec27° / 13°759.9014.26.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 68% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 14%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18218
28218
38218
48218
58218
68218
78317
88317
98416
108515
118515
128515
138515
148713
158713
168713
178713
188911
198911
208911
218911
228911
238911
248911
258812
268812
278812
288812
298812
308713
318713

Chance of precipitation in December

Any precipitation

Tunuyán gets around 75 mm of rain over 9.9 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 32% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
437
537
636
736
835
935
1034
1134
1233
1332
1432
1531
1631
1730
1830
1929
2029
2129
2229
2329
2429
2530
2630
2730
2831
2931
3032
3132

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 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19820
29730
39730
49730
59640
69640
79550
89550
99460
109370
119370
129280
139280
149190
159190
1689101
1789101
1889101
1988111
2088111
2186122
2285132
2385132
2484142
2583152
2682153
2781163
2880173
2980173
3079183
3178193

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 12 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 6:24 AM to 6:33 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)
114.16:248:28
214.16:248:29
314.16:248:29
414.16:248:30
514.16:248:31
614.16:248:32
714.16:248:33
814.26:248:33
914.26:248:34
1014.26:248:35
1114.26:248:35
1214.26:258:36
1314.26:258:37
1414.26:258:37
1514.26:258:38
1614.26:268:39
1714.26:268:39
1814.26:268:40
1914.26:278:40
2014.26:278:41
2114.26:288:41
2214.26:288:42
2314.26:298:42
2414.26:298:43
2514.26:308:43
2614.26:308:44
2714.26:318:44
2814.26:318:44
2914.26:328:45
3014.26:338:45
3114.26:338:45

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.35 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 8.35 kWh/m² in December across the year — December's 8.35 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.3Intense
28.3Intense
38.3Intense
48.3Intense
58.3Intense
68.3Intense
78.3Intense
88.3Intense
98.3Intense
108.3Intense
118.3Intense
128.4Intense
138.4Intense
148.4Intense
158.4Intense
168.4Intense
178.4Intense
188.4Intense
198.4Intense
208.4Intense
218.4Intense
228.4Intense
238.4Intense
248.4Intense
258.3Intense
268.3Intense
278.3Intense
288.3Intense
298.3Intense
308.3Intense
318.3Intense
Planning a trip in December

Is December a good time to visit Tunuyán?

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

6.9
Sightseeing
2nd-best month of the year
7.1
Beach & pool
2nd-best month of the year

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

What to pack for Tunuyán in December

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

In December, Tunuyán sees daytime highs around 27°C and nights near 13°C. Pack sun protection. Worth having: light clothes and rain gear. About 10 days see rain.

sun protectionlight clothesrain gear

UV index in Tunuyán 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 Tunuyán peaks around January 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighExtremeJan 17UV 15Jun 20UV 3
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar11Extreme
Apr6High
May5High
Jun3Moderate
Jul4Moderate
Aug6High
Sep6High
Oct10Extreme
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Tunuyán?

Tunuyán sits at 33.6°S, 69.0°W, 864 m above sea level, in Argentina. The nearest listed city is Tupungato, 27 km away.

Topography around Tunuyán

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

Within 3 km, the terrain around Tunuyán has only modest variations in elevation — a maximum elevation change of 92 m around an average of 885 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 203 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,950 m.

The land around Tunuyán is covered by grassland (29%), shrubs (23%) and cropland (20%) within 3 km, shrubs (44%) and cropland (28%) within 16 km, and shrubs (44%), grassland (25%) and bare terrain (21%) within 80 km.

3 km
92 m
16 km
203 m
80 km
5,950 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and icewater
December weather nearby: Tupungato 27 km · Perdriel 58 km · Rivadavia 67 km · Rodeo del Medio 72 km · San Martín 75 km · Mendoza 79 km · San Rafael 131 km · Peñalolén 141 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 Tunuyán (-33.5812°, -69.0154°, elevation 864 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).