Mariano Roque Alonso Weather in December

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

Average highs run from 33°C on December 1 to 34°C on December 31, and lows from 21°C to 23°C. Normal precipitation for the month is 177 mm over about 12 wet days.

December day by day

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

Normal low
Normal high
Record high
Record low

December at a glance

Average high: 33°C
Average low: 22°C
Precipitation: 177 mm
Record high: 42°CDec 10, 1985
Record low: 13°CDec 4, 2008
Daylight: 13 h 35 min to 13 h 41 min
Cloud cover: 60%
Humidity: 69%
Dew point: 21°C
Wind: 13.0 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	Record high	Record low	Chance wet
Dec 1	33°C	21°C	40°C 1999	14°C 1975	41%
Dec 2	33°C	21°C	38°C 2024	15°C 2011	42%
Dec 3	33°C	22°C	39°C 1990	15°C 1974	41%
Dec 4	33°C	22°C	38°C 2007	13°C 2008	41%
Dec 5	33°C	22°C	37°C 2006	14°C 1994	41%
Dec 6	33°C	22°C	38°C 2006	16°C 2000	41%
Dec 7	33°C	22°C	38°C 1990	16°C 2003	41%
Dec 8	33°C	22°C	39°C 1988	16°C 1996	40%
Dec 9	33°C	22°C	41°C 2008	15°C 1973	40%
Dec 10	33°C	22°C	42°C 1985	16°C 1987	40%
Dec 11	33°C	22°C	38°C 1985	19°C 2004	39%
Dec 12	33°C	22°C	39°C 1985	19°C 1987	38%
Dec 13	33°C	22°C	38°C 2012	15°C 2010	37%
Dec 14	33°C	22°C	36°C 1989	15°C 2011	39%
Dec 15	33°C	22°C	36°C 2006	15°C 2010	40%
Dec 16	33°C	22°C	36°C 1983	17°C 2024	40%
Dec 17	34°C	22°C	38°C 1985	15°C 2003	40%
Dec 18	34°C	22°C	39°C 1985	16°C 2000	38%
Dec 19	34°C	22°C	39°C 2023	16°C 2011	38%
Dec 20	34°C	23°C	39°C 2002	19°C 1991	38%
Dec 21	34°C	23°C	39°C 2008	16°C 1989	38%
Dec 22	34°C	23°C	40°C 2011	16°C 1987	40%
Dec 23	34°C	23°C	40°C 2011	17°C 1981	40%
Dec 24	34°C	23°C	39°C 2008	15°C 1998	42%
Dec 25	34°C	23°C	38°C 1989	18°C 2002	43%
Dec 26	34°C	23°C	39°C 2012	17°C 2004	44%
Dec 27	34°C	23°C	38°C 2021	16°C 2023	44%
Dec 28	34°C	23°C	37°C 2022	17°C 1978	43%
Dec 29	34°C	23°C	39°C 2008	18°C 1975	41%
Dec 30	34°C	23°C	40°C 2021	20°C 1976	40%
Dec 31	34°C	23°C	35°C 2010	14°C 1974	40%

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 7:27 PM
December 31: sunrise 6:03 AM, sunset 7:44 PM

Every day of December: sun and moon

Other months

Sources

Records: NOAA GHCN-Daily, station PAM00086218, every year on file, quality-flagged values removed. 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.