Bertioga Weather in December

NASA POWER reanalysis for the half-degree grid cell around Bertioga, 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 21°C to 23°C. Normal precipitation for the month is 177 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: 22°C
Precipitation: 177 mm
Reanalysis high: 35°CDec 27, 2016
Reanalysis low: 18°CDec 14, 1992
Daylight: 13 h 30 min to 13 h 35 min
Cloud cover: 76%
Humidity: 83%
Dew point: 21°C
Wind: 14.8 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	21°C	32°C 2002	19°C 2008	60%
Dec 2	26°C	21°C	30°C 2014	19°C 2019	61%
Dec 3	26°C	22°C	34°C 2020	19°C 2019	62%
Dec 4	26°C	22°C	33°C 1994	18°C 2008	62%
Dec 5	26°C	22°C	31°C 2013	18°C 2008	63%
Dec 6	26°C	22°C	30°C 2002	18°C 2008	64%
Dec 7	26°C	22°C	33°C 2012	18°C 2008	65%
Dec 8	26°C	22°C	29°C 2004	19°C 2019	66%
Dec 9	26°C	22°C	31°C 2013	19°C 2018	65%
Dec 10	27°C	22°C	30°C 2014	19°C 1996	66%
Dec 11	27°C	22°C	34°C 2012	20°C 2005	67%
Dec 12	27°C	22°C	33°C 2018	19°C 2011	67%
Dec 13	27°C	22°C	31°C 1994	19°C 1992	67%
Dec 14	27°C	22°C	32°C 2018	18°C 1992	68%
Dec 15	27°C	22°C	33°C 2018	18°C 1995	68%
Dec 16	27°C	22°C	34°C 2019	20°C 1995	69%
Dec 17	27°C	22°C	32°C 2018	20°C 2008	70%
Dec 18	27°C	22°C	33°C 2015	20°C 1996	71%
Dec 19	27°C	22°C	32°C 2006	20°C 1996	70%
Dec 20	27°C	23°C	33°C 2020	21°C 2007	70%
Dec 21	27°C	23°C	34°C 2018	20°C 1993	70%
Dec 22	27°C	23°C	34°C 2018	20°C 1993	70%
Dec 23	27°C	23°C	33°C 1997	20°C 1993	69%
Dec 24	27°C	23°C	31°C 1991	20°C 1992	69%
Dec 25	27°C	23°C	34°C 2012	21°C 2003	70%
Dec 26	27°C	23°C	33°C 2012	19°C 1992	70%
Dec 27	27°C	23°C	35°C 2016	19°C 1992	72%
Dec 28	27°C	23°C	32°C 2014	19°C 1992	73%
Dec 29	27°C	23°C	32°C 2007	20°C 1992	74%
Dec 30	27°C	23°C	32°C 2007	19°C 1993	74%
Dec 31	27°C	23°C	34°C 2013	19°C 1993	74%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:09 AM, sunset 6:39 PM
December 31: sunrise 5:20 AM, sunset 6:55 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.