Matías Romero Avendaño Weather in December

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

Average highs run from 26°C on December 1 to 25°C on December 31, and lows from 18°C to 17°C. Normal precipitation for the month is 34 mm over about 9 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: 25°C
Average low: 17°C
Precipitation: 34 mm
Reanalysis high: 33°CDec 24, 2015
Reanalysis low: 8°CDec 15, 1997
Daylight: 11 h 12 min to 11 h 09 min
Cloud cover: 66%
Humidity: 87%
Dew point: 18°C
Wind: 19.8 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	26°C	18°C	29°C 2009	11°C 2011	32%
Dec 2	25°C	18°C	30°C 1991	14°C 2006	32%
Dec 3	25°C	18°C	30°C 1994	14°C 2008	32%
Dec 4	25°C	18°C	30°C 2016	13°C 2006	32%
Dec 5	25°C	18°C	30°C 1994	13°C 2006	30%
Dec 6	25°C	18°C	30°C 2016	14°C 2002	31%
Dec 7	25°C	18°C	29°C 1994	13°C 2002	30%
Dec 8	25°C	17°C	30°C 1994	12°C 2000	30%
Dec 9	25°C	17°C	29°C 2012	12°C 2017	30%
Dec 10	25°C	17°C	30°C 2019	11°C 2010	29%
Dec 11	25°C	17°C	28°C 2015	11°C 2010	30%
Dec 12	25°C	17°C	31°C 2015	11°C 2008	30%
Dec 13	25°C	17°C	30°C 2020	10°C 1997	28%
Dec 14	25°C	17°C	29°C 1994	9°C 1997	28%
Dec 15	25°C	17°C	31°C 2015	8°C 1997	28%
Dec 16	25°C	17°C	31°C 2015	10°C 1997	28%
Dec 17	25°C	17°C	31°C 2016	11°C 1997	28%
Dec 18	25°C	17°C	31°C 2016	11°C 2003	28%
Dec 19	25°C	17°C	30°C 2012	11°C 1996	28%
Dec 20	25°C	17°C	31°C 1994	12°C 1996	29%
Dec 21	25°C	17°C	29°C 1994	14°C 2002	28%
Dec 22	25°C	17°C	29°C 2015	12°C 2018	28%
Dec 23	25°C	17°C	31°C 2015	13°C 2018	28%
Dec 24	25°C	17°C	33°C 2015	14°C 2012	27%
Dec 25	25°C	17°C	30°C 2012	13°C 2014	27%
Dec 26	25°C	17°C	30°C 2015	13°C 2004	27%
Dec 27	25°C	17°C	31°C 2015	11°C 2006	27%
Dec 28	25°C	17°C	32°C 1994	11°C 2006	28%
Dec 29	25°C	17°C	29°C 2019	13°C 2010	27%
Dec 30	25°C	17°C	29°C 1994	12°C 1997	26%
Dec 31	25°C	17°C	31°C 1994	11°C 1997	26%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (CST).

December 1: sunrise 6:33 AM, sunset 5:45 PM
December 31: sunrise 6:49 AM, sunset 5:58 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.