Avellaneda weather in December

In December, Avellaneda sees average daytime highs of 31°C and overnight lows near 20°C, with 155 mm of rain across 9.9 wet days and about 13.8 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 30°C in the first days to 31°C by the end. The sky is clear or mostly clear about 44% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 42 min at the start of December to 13 h 48 min by month's end. Set against the rest of the year, December is Avellaneda's 6th-clearest and 7th-windiest month. For the whole year in context, see Avellaneda's year-round climate.

Daytime high
31°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
155 mm
9.9 wet days
Daylight
13 h 54 min
5:59 AM – 7:50 PM
Cloud cover
48%
6th clearest
Wind
12 km/h
7th windiest
Solar energy
6.98 kWh/m²
Travel score
4.8
out of 10

Avellaneda is town in Santa Fe Province, Argentina.

Density
25/km²
people per km²
Founded
1879

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 30°C in the first days to 31°C by the end.

A typical December day in Avellaneda reaches about 31°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12919
23019
33019
43019
53019
63019
73019
83019
93019
103019
113019
123019
133020
143020
153120
163120
173120
183120
193120
203120
213120
223120
233121
243121
253121
263121
273121
283121
293121
303221
313221

How December really feels in Avellaneda

Once humidity and wind are folded in, December averages 13 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
13
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Avellaneda weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 21°13910.513.74.3
Feb31° / 21°1209.7134.7
Mar29° / 19°1259.612.25.7
Apr26° / 16°1479.411.37.0
May22° / 13°847.410.67.1
Jun20° / 11°67710.26.7
Jul19° / 465.510.37.1
Aug22° / 11°645.7117.7
Sep24° / 13°927.111.87.7
Oct26° / 16°14710.612.76.7
Nov28° / 18°1419.213.56.1
Dec31° / 20°1559.913.84.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26139
36139
46238
56238
66139
76238
86238
96238
106337
116337
126337
136337
146337
156337
166337
176337
186337
196238
206238
216238
226139
236139
246040
256040
266040
276040
286040
296040
305842
315842

Chance of precipitation in December

Any precipitation

Avellaneda gets around 155 mm of rain over 9.9 wet days in December, the wettest month. 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 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
333
432
532
632
731
831
931
1031
1131
1231
1331
1432
1532
1633
1733
1833
1933
2033
2134
2234
2334
2434
2533
2633
2733
2833
2932
3032
3132

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 55% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
110183028131
210183028131
310183028131
410173029141
510172929141
610162929151
79162930151
89162830161
99162731161
108162731171
118162632171
128162532181
137152533181
147152534191
156152434192
166152434202
176142335212
185142235222
195142234233
204142134243
214132134253
224132033264
234132032274
243122031285
253122030295
263122030305
273112029316
283112028326
293112028326
303112027337
313102027337

Wind in December

Winds average 12 km/h in December.

Across December, daily wind ranges from about 11 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
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 42 min at the start of December to 13 h 48 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 5:57 AM to 6:07 AM, and sunset from 7:40 PM to 7:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:577:40
213.75:577:41
313.85:577:42
413.85:577:42
513.85:577:43
613.85:577:44
713.85:577:45
813.85:577:45
913.85:577:46
1013.85:587:47
1113.85:587:47
1213.85:587:48
1313.85:587:49
1413.85:597:49
1513.85:597:50
1613.95:597:50
1713.96:007:51
1813.96:007:51
1913.96:007:52
2013.96:017:53
2113.96:017:53
2213.96:027:54
2313.96:027:54
2413.96:037:54
2513.96:037:55
2613.96:047:55
2713.96:047:56
2813.96:057:56
2913.86:057:56
3013.86:067:57
3113.86:077:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.98 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.54 kWh/m² to a high of 6.98 kWh/m² in December across the year — December's 6.98 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.9Intense
46.9Intense
56.9Intense
66.9Intense
76.9Intense
86.9Intense
96.9Intense
107.0Intense
117.0Intense
127.0Intense
137.0Intense
147.0Intense
157.0Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
237.0Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
307.0Intense
317.0Intense
Planning a trip in December

Is December a good time to visit Avellaneda?

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

4.8
Sightseeing
10th-best month of the year
6.9
Beach & pool
3rd-best month of the year

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

What to pack for Avellaneda in December

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

In December, Avellaneda sees daytime highs around 31°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Avellaneda 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 Avellaneda peaks around January 24 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 24UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr7Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug6High
Sep7Very high
Oct9Very high
Nov11Extreme
Dec13Extreme
Location & terrain

Where is Avellaneda?

Avellaneda sits at 29.1°S, 59.7°W, 52 m above sea level, in Argentina. The nearest listed city is Reconquista, 4.0 km away.

Topography around Avellaneda

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

Within 3 km, the terrain around Avellaneda has only modest variations in elevation — a maximum elevation change of 23 m around an average of 44 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 70 m.

The land around Avellaneda is covered by cropland (38%) and artificial surfaces (28%) within 3 km, cropland (32%), wetland (26%) and grassland (20%) within 16 km, and trees (31%), grassland (29%) and wetland (22%) within 80 km.

3 km
23 m
16 km
37 m
80 km
70 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Reconquista 4.0 km · Goya 38 km · Vera 66 km · Villa Ocampo 76 km · Esquina 101 km · Saladas 139 km · San Lorenzo 140 km · Mercedes 154 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 Avellaneda (-29.1176°, -59.6583°, elevation 52 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).