Monte Caseros Weather in December

NASA POWER reanalysis for the half-degree grid cell around Monte Caseros, 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 17°C to 20°C. Normal precipitation for the month is 152 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: 19°C
Precipitation: 152 mm
Reanalysis high: 43°CDec 18, 1995
Reanalysis low: 8°CDec 1, 1993
Daylight: 13 h 57 min to 14 h 04 min
Cloud cover: 50%
Humidity: 63%
Dew point: 16°C
Wind: 14.8 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	17°C	36°C 2010	8°C 1993	33%
Dec 2	31°C	17°C	38°C 2010	10°C 2019	33%
Dec 3	31°C	17°C	39°C 2012	10°C 2018	33%
Dec 4	31°C	17°C	36°C 1995	12°C 2009	33%
Dec 5	31°C	17°C	36°C 2010	11°C 2009	34%
Dec 6	31°C	17°C	37°C 1995	10°C 1999	36%
Dec 7	31°C	17°C	39°C 2010	10°C 2005	36%
Dec 8	31°C	18°C	40°C 2008	11°C 2018	35%
Dec 9	31°C	18°C	37°C 1997	10°C 2001	36%
Dec 10	32°C	18°C	40°C 2010	12°C 2001	36%
Dec 11	32°C	18°C	40°C 1994	12°C 2005	34%
Dec 12	32°C	18°C	40°C 1994	12°C 2003	35%
Dec 13	32°C	18°C	39°C 2017	10°C 2010	35%
Dec 14	32°C	18°C	36°C 2013	11°C 2016	37%
Dec 15	32°C	18°C	38°C 1995	11°C 2016	38%
Dec 16	32°C	19°C	40°C 1995	13°C 2000	40%
Dec 17	32°C	19°C	42°C 1995	11°C 2003	40%
Dec 18	32°C	19°C	43°C 1995	13°C 1998	40%
Dec 19	32°C	19°C	41°C 1995	14°C 2015	39%
Dec 20	32°C	19°C	42°C 1995	14°C 2005	39%
Dec 21	32°C	19°C	42°C 1995	13°C 1993	38%
Dec 22	32°C	19°C	41°C 2011	12°C 2019	37%
Dec 23	33°C	19°C	39°C 2013	11°C 2014	38%
Dec 24	33°C	19°C	39°C 2013	13°C 2002	38%
Dec 25	33°C	20°C	41°C 2013	11°C 2002	38%
Dec 26	33°C	20°C	42°C 1999	14°C 2002	38%
Dec 27	33°C	20°C	41°C 1999	13°C 2012	38%
Dec 28	33°C	20°C	39°C 2013	14°C 2012	36%
Dec 29	33°C	20°C	41°C 2013	13°C 2003	35%
Dec 30	33°C	20°C	41°C 2013	12°C 1993	35%
Dec 31	33°C	20°C	40°C 2013	14°C 1993	34%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:41 AM, sunset 7:38 PM
December 31: sunrise 5:52 AM, sunset 7:56 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.