Cotia Weather in December

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

Average highs run from 27°C on December 1 to 27°C on December 31, and lows from 17°C to 18°C. Normal precipitation for the month is 183 mm over about 22 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: 18°C
Precipitation: 183 mm
Reanalysis high: 34°CDec 16, 2018
Reanalysis low: 10°CDec 9, 2018
Daylight: 13 h 29 min to 13 h 34 min
Cloud cover: 76%
Humidity: 81%
Dew point: 18°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	27°C	17°C	32°C 2014	14°C 2001	65%
Dec 2	27°C	17°C	33°C 1998	12°C 2001	66%
Dec 3	27°C	17°C	33°C 2020	13°C 2019	67%
Dec 4	27°C	17°C	33°C 2012	12°C 2008	68%
Dec 5	27°C	17°C	32°C 2012	13°C 2008	69%
Dec 6	27°C	17°C	32°C 2012	13°C 2008	70%
Dec 7	27°C	17°C	33°C 2016	14°C 2008	72%
Dec 8	27°C	17°C	31°C 2012	12°C 2019	71%
Dec 9	27°C	17°C	32°C 2008	10°C 2018	72%
Dec 10	27°C	17°C	32°C 2012	13°C 1996	72%
Dec 11	27°C	17°C	33°C 2012	15°C 2011	74%
Dec 12	27°C	17°C	33°C 2018	13°C 2011	76%
Dec 13	27°C	17°C	34°C 2018	13°C 1992	75%
Dec 14	27°C	18°C	33°C 2018	10°C 1992	76%
Dec 15	27°C	18°C	33°C 2018	11°C 1995	77%
Dec 16	27°C	18°C	34°C 2018	12°C 1995	77%
Dec 17	27°C	18°C	32°C 2018	15°C 2008	77%
Dec 18	27°C	18°C	33°C 2014	14°C 2013	77%
Dec 19	27°C	18°C	32°C 2020	14°C 1998	76%
Dec 20	27°C	18°C	32°C 2020	14°C 2000	75%
Dec 21	27°C	18°C	33°C 2011	14°C 1993	75%
Dec 22	27°C	18°C	32°C 2011	14°C 1993	74%
Dec 23	27°C	18°C	32°C 2011	13°C 1992	74%
Dec 24	27°C	18°C	31°C 2011	12°C 1992	74%
Dec 25	27°C	18°C	31°C 2012	14°C 2001	75%
Dec 26	27°C	18°C	33°C 2013	14°C 1992	75%
Dec 27	27°C	18°C	34°C 2013	13°C 1992	76%
Dec 28	27°C	18°C	33°C 2013	13°C 1992	76%
Dec 29	27°C	18°C	31°C 2019	14°C 2010	77%
Dec 30	27°C	18°C	33°C 2002	14°C 1993	77%
Dec 31	27°C	18°C	33°C 2018	14°C 1993	76%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:12 AM, sunset 6:41 PM
December 31: sunrise 5:24 AM, sunset 6:58 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.