Avellaneda Weather in December

NASA POWER reanalysis for the half-degree grid cell around Avellaneda, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 32°C on December 1 to 34°C on December 31, and lows from 19°C to 21°C. Normal precipitation for the month is 164 mm over about 12 wet days.

December day by day

The normal high and low for each date, in °C.

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

December at a glance

Average high: 33°C
Average low: 20°C
Precipitation: 164 mm
Reanalysis high: 44°CDec 22, 2011
Reanalysis low: 9°CDec 1, 1993
Daylight: 13 h 52 min to 13 h 59 min
Cloud cover: 54%
Humidity: 62%
Dew point: 17°C
Wind: 14.0 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

Date	Normal high	Normal low	Reanalysis high	Reanalysis low	Chance wet
Dec 1	32°C	19°C	39°C 2007	9°C 1993	37%
Dec 2	32°C	19°C	38°C 1994	12°C 1993	37%
Dec 3	32°C	19°C	40°C 1998	12°C 2018	36%
Dec 4	32°C	19°C	39°C 1998	14°C 1994	35%
Dec 5	33°C	19°C	36°C 1995	12°C 1994	35%
Dec 6	33°C	19°C	37°C 1995	13°C 2020	35%
Dec 7	33°C	19°C	39°C 2008	12°C 2005	35%
Dec 8	33°C	19°C	42°C 2008	13°C 2018	35%
Dec 9	33°C	19°C	38°C 1994	12°C 2001	35%
Dec 10	33°C	19°C	40°C 1994	16°C 2001	34%
Dec 11	33°C	19°C	41°C 1994	14°C 2005	34%
Dec 12	33°C	19°C	38°C 1998	14°C 2010	35%
Dec 13	33°C	20°C	41°C 2017	11°C 2010	36%
Dec 14	33°C	20°C	38°C 2007	11°C 2010	38%
Dec 15	33°C	20°C	40°C 2017	12°C 2016	38%
Dec 16	33°C	20°C	44°C 2017	14°C 2000	39%
Dec 17	33°C	20°C	40°C 2012	12°C 2003	38%
Dec 18	33°C	20°C	42°C 1995	13°C 2003	38%
Dec 19	33°C	20°C	42°C 2011	16°C 1998	38%
Dec 20	34°C	20°C	44°C 2011	14°C 2005	38%
Dec 21	34°C	20°C	43°C 2011	13°C 1993	38%
Dec 22	34°C	21°C	44°C 2011	14°C 2019	37%
Dec 23	34°C	21°C	41°C 2007	12°C 2003	37%
Dec 24	34°C	21°C	41°C 2013	13°C 2014	36%
Dec 25	34°C	21°C	42°C 2013	12°C 2002	37%
Dec 26	34°C	21°C	42°C 2013	15°C 1991	36%
Dec 27	34°C	21°C	42°C 1994	15°C 1991	35%
Dec 28	34°C	21°C	41°C 2013	14°C 2012	33%
Dec 29	34°C	21°C	43°C 2013	16°C 2003	32%
Dec 30	34°C	21°C	43°C 2013	13°C 1993	32%
Dec 31	34°C	21°C	43°C 2013	15°C 2020	32%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-3).

December 1: sunrise 5:52 AM, sunset 7:44 PM
December 31: sunrise 6:02 AM, sunset 8:01 PM

Every day of December: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.