Arroyito Weather in December

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

Average highs run from 31°C on December 1 to 33°C on December 31, and lows from 16°C to 19°C. Normal precipitation for the month is 133 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: 32°C
Average low: 17°C
Precipitation: 133 mm
Reanalysis high: 43°CDec 16, 2017
Reanalysis low: 7°CDec 6, 1999
Daylight: 14 h 03 min to 14 h 10 min
Cloud cover: 54%
Humidity: 59%
Dew point: 15°C
Wind: 11.9 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	31°C	16°C	39°C 1994	9°C 2001	45%
Dec 2	31°C	16°C	39°C 2004	9°C 2014	44%
Dec 3	31°C	16°C	37°C 1993	11°C 2008	44%
Dec 4	31°C	16°C	38°C 1995	10°C 1994	43%
Dec 5	31°C	16°C	37°C 1995	10°C 2019	42%
Dec 6	32°C	16°C	38°C 2014	7°C 1999	42%
Dec 7	32°C	16°C	37°C 2001	8°C 1999	42%
Dec 8	32°C	17°C	39°C 2008	11°C 2001	42%
Dec 9	32°C	17°C	40°C 1994	9°C 2003	42%
Dec 10	32°C	17°C	40°C 2010	13°C 2005	42%
Dec 11	32°C	17°C	40°C 2019	11°C 2005	42%
Dec 12	32°C	17°C	40°C 2016	12°C 2010	42%
Dec 13	32°C	17°C	38°C 2007	9°C 2010	43%
Dec 14	32°C	17°C	37°C 2013	12°C 2016	44%
Dec 15	33°C	17°C	38°C 2008	10°C 2007	42%
Dec 16	33°C	17°C	43°C 2017	8°C 2000	42%
Dec 17	33°C	17°C	41°C 1995	11°C 2003	41%
Dec 18	33°C	17°C	41°C 1995	13°C 2017	40%
Dec 19	33°C	18°C	41°C 1995	11°C 2015	40%
Dec 20	33°C	18°C	42°C 2011	13°C 2002	41%
Dec 21	33°C	18°C	43°C 2011	11°C 2014	42%
Dec 22	33°C	18°C	40°C 2013	10°C 2014	42%
Dec 23	33°C	18°C	40°C 2007	10°C 2014	43%
Dec 24	33°C	18°C	40°C 2013	12°C 2002	44%
Dec 25	33°C	18°C	42°C 2013	11°C 2011	45%
Dec 26	33°C	18°C	40°C 1994	12°C 2004	45%
Dec 27	33°C	18°C	39°C 1994	11°C 1991	44%
Dec 28	33°C	19°C	38°C 2017	11°C 2003	44%
Dec 29	33°C	19°C	38°C 2007	11°C 2003	45%
Dec 30	33°C	19°C	41°C 2017	14°C 1993	47%
Dec 31	33°C	19°C	41°C 1994	12°C 2020	47%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 6:00 AM, sunset 8:03 PM
December 31: sunrise 6:10 AM, sunset 8:20 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.