Monteros Weather in December

NASA POWER reanalysis for the half-degree grid cell around Monteros, 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 27°C on December 31, and lows from 14°C to 16°C. Normal precipitation for the month is 140 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: 27°C
Average low: 15°C
Precipitation: 140 mm
Reanalysis high: 36°CDec 20, 1995
Reanalysis low: 6°CDec 13, 2010
Daylight: 13 h 44 min to 13 h 50 min
Cloud cover: 63%
Humidity: 66%
Dew point: 13°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	Reanalysis high	Reanalysis low	Chance wet
Dec 1	26°C	14°C	34°C 1994	9°C 1993	42%
Dec 2	26°C	14°C	35°C 1994	8°C 2018	42%
Dec 3	26°C	14°C	35°C 1993	9°C 2001	43%
Dec 4	26°C	14°C	33°C 1993	9°C 2001	42%
Dec 5	26°C	14°C	32°C 2014	9°C 2020	43%
Dec 6	26°C	14°C	35°C 2014	7°C 1999	43%
Dec 7	26°C	14°C	31°C 2014	7°C 1999	42%
Dec 8	26°C	14°C	32°C 1991	10°C 2018	41%
Dec 9	26°C	14°C	33°C 1994	10°C 2001	42%
Dec 10	26°C	14°C	34°C 2012	11°C 1996	41%
Dec 11	26°C	15°C	34°C 1994	11°C 2007	40%
Dec 12	26°C	15°C	33°C 2012	9°C 2010	40%
Dec 13	27°C	15°C	33°C 2018	6°C 2010	40%
Dec 14	27°C	15°C	32°C 2012	10°C 2010	40%
Dec 15	27°C	15°C	32°C 2004	11°C 1991	38%
Dec 16	27°C	15°C	35°C 2017	10°C 2007	38%
Dec 17	27°C	15°C	33°C 1995	11°C 1998	39%
Dec 18	27°C	15°C	34°C 1995	11°C 2017	39%
Dec 19	27°C	15°C	34°C 2012	10°C 2015	39%
Dec 20	27°C	15°C	36°C 1995	10°C 2015	40%
Dec 21	27°C	15°C	36°C 2003	11°C 2014	42%
Dec 22	27°C	16°C	33°C 2011	9°C 1998	42%
Dec 23	27°C	16°C	32°C 1993	7°C 2014	44%
Dec 24	27°C	16°C	34°C 2019	10°C 2014	45%
Dec 25	27°C	16°C	32°C 2003	10°C 2011	47%
Dec 26	27°C	16°C	34°C 1997	11°C 2012	47%
Dec 27	27°C	16°C	34°C 1998	10°C 2012	46%
Dec 28	27°C	16°C	34°C 1998	11°C 2012	46%
Dec 29	27°C	16°C	32°C 2013	10°C 2003	47%
Dec 30	27°C	16°C	32°C 2013	12°C 1993	48%
Dec 31	27°C	16°C	34°C 2012	12°C 2020	49%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 6:19 AM, sunset 8:03 PM
December 31: sunrise 6:30 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.