Monteiro Weather in December

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

Average highs run from 35°C on December 1 to 34°C on December 31, and lows from 20°C to 20°C. Normal precipitation for the month is 28 mm over about 3 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: 34°C
Average low: 20°C
Precipitation: 28 mm
Reanalysis high: 38°CDec 4, 2015
Reanalysis low: 16°CDec 23, 1991
Daylight: 12 h 33 min to 12 h 35 min
Cloud cover: 52%
Humidity: 59%
Dew point: 16°C
Wind: 20.9 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	35°C	20°C	37°C 2004	17°C 1995	9%
Dec 2	35°C	20°C	37°C 2019	17°C 2007	10%
Dec 3	35°C	20°C	37°C 2019	18°C 1994	10%
Dec 4	35°C	20°C	38°C 2015	18°C 1994	10%
Dec 5	35°C	20°C	37°C 2008	18°C 2004	10%
Dec 6	35°C	20°C	37°C 2015	19°C 2002	10%
Dec 7	35°C	20°C	37°C 2016	17°C 2006	10%
Dec 8	35°C	20°C	37°C 2016	17°C 1994	10%
Dec 9	35°C	20°C	37°C 1997	18°C 1993	11%
Dec 10	35°C	20°C	37°C 2016	17°C 2013	12%
Dec 11	34°C	20°C	37°C 2015	18°C 1996	13%
Dec 12	34°C	20°C	37°C 2012	18°C 1995	13%
Dec 13	34°C	20°C	37°C 1998	18°C 2005	14%
Dec 14	34°C	20°C	36°C 2012	18°C 2005	14%
Dec 15	34°C	20°C	37°C 1995	18°C 2018	15%
Dec 16	34°C	20°C	36°C 1993	17°C 2018	15%
Dec 17	34°C	20°C	36°C 1991	18°C 2011	15%
Dec 18	34°C	20°C	37°C 2012	17°C 2011	15%
Dec 19	34°C	20°C	37°C 1994	17°C 1998	14%
Dec 20	34°C	20°C	36°C 1998	17°C 2000	14%
Dec 21	34°C	20°C	37°C 1993	18°C 2000	16%
Dec 22	34°C	20°C	37°C 1993	17°C 2005	16%
Dec 23	34°C	20°C	37°C 2019	16°C 1991	17%
Dec 24	34°C	20°C	36°C 2019	18°C 2007	18%
Dec 25	34°C	20°C	36°C 2006	18°C 2007	18%
Dec 26	34°C	20°C	36°C 2012	18°C 1998	18%
Dec 27	34°C	20°C	36°C 2003	17°C 1998	17%
Dec 28	34°C	20°C	36°C 2011	18°C 2010	18%
Dec 29	34°C	20°C	36°C 1993	17°C 2007	18%
Dec 30	34°C	20°C	37°C 2018	19°C 2013	19%
Dec 31	34°C	20°C	37°C 1993	17°C 1992	19%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:01 AM, sunset 5:34 PM
December 31: sunrise 5:14 AM, sunset 5:49 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.