Mar del Plata Weather in December

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

Average highs run from 21°C on December 1 to 24°C on December 31, and lows from 13°C to 16°C. Normal precipitation for the month is 115 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: 23°C
Average low: 15°C
Precipitation: 115 mm
Reanalysis high: 33°CDec 29, 2017
Reanalysis low: 8°CDec 3, 2001
Daylight: 14 h 37 min to 14 h 46 min
Cloud cover: 50%
Humidity: 73%
Dew point: 13°C
Wind: 21.2 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	21°C	13°C	29°C 1998	10°C 1993	35%
Dec 2	21°C	13°C	29°C 2016	9°C 2005	36%
Dec 3	21°C	13°C	26°C 1995	8°C 2001	36%
Dec 4	21°C	13°C	25°C 1995	9°C 2000	36%
Dec 5	21°C	13°C	27°C 1995	10°C 1993	38%
Dec 6	21°C	13°C	28°C 2014	9°C 2018	38%
Dec 7	21°C	14°C	29°C 2008	8°C 2005	38%
Dec 8	22°C	14°C	29°C 1993	9°C 2001	38%
Dec 9	22°C	14°C	28°C 1994	8°C 2001	38%
Dec 10	22°C	14°C	30°C 2006	10°C 2000	37%
Dec 11	22°C	14°C	30°C 1998	10°C 2007	36%
Dec 12	22°C	14°C	28°C 2006	10°C 2003	36%
Dec 13	22°C	14°C	28°C 2015	10°C 2019	37%
Dec 14	22°C	14°C	27°C 2020	11°C 1995	38%
Dec 15	22°C	14°C	30°C 2013	10°C 2000	37%
Dec 16	23°C	14°C	30°C 2008	9°C 2000	37%
Dec 17	23°C	15°C	32°C 2013	10°C 1997	37%
Dec 18	23°C	15°C	28°C 1993	11°C 2018	37%
Dec 19	23°C	15°C	29°C 2014	11°C 2000	36%
Dec 20	23°C	15°C	31°C 2007	11°C 2005	36%
Dec 21	23°C	15°C	29°C 2016	11°C 2020	36%
Dec 22	24°C	15°C	29°C 2013	11°C 1999	37%
Dec 23	24°C	15°C	31°C 2013	10°C 1999	37%
Dec 24	24°C	15°C	31°C 2013	12°C 2000	38%
Dec 25	24°C	16°C	31°C 1998	13°C 1991	39%
Dec 26	24°C	16°C	33°C 1998	12°C 1991	39%
Dec 27	24°C	16°C	32°C 2015	13°C 2000	40%
Dec 28	24°C	16°C	31°C 2014	12°C 2000	39%
Dec 29	24°C	16°C	33°C 2017	12°C 2003	39%
Dec 30	24°C	16°C	30°C 2004	12°C 2000	40%
Dec 31	24°C	16°C	32°C 2004	12°C 2003	41%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:21 AM, sunset 7:58 PM
December 31: sunrise 5:30 AM, sunset 8:16 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.