Ribeirão Weather in December

NASA POWER reanalysis for the half-degree grid cell around Ribeirão, 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 33°C on December 31, and lows from 21°C to 21°C. Normal precipitation for the month is 31 mm over about 6 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: 33°C
Average low: 21°C
Precipitation: 31 mm
Reanalysis high: 37°CDec 2, 2019
Reanalysis low: 18°CDec 11, 1996
Daylight: 12 h 35 min to 12 h 37 min
Cloud cover: 57%
Humidity: 69%
Dew point: 19°C
Wind: 16.6 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	33°C	21°C	36°C 1997	19°C 2006	16%
Dec 2	33°C	21°C	37°C 2019	19°C 1995	14%
Dec 3	33°C	21°C	37°C 2019	19°C 2011	14%
Dec 4	33°C	21°C	37°C 2015	19°C 1994	13%
Dec 5	33°C	21°C	36°C 2015	20°C 1993	13%
Dec 6	33°C	21°C	36°C 2015	20°C 2011	13%
Dec 7	33°C	21°C	37°C 2002	20°C 2006	14%
Dec 8	33°C	21°C	36°C 2016	19°C 2011	15%
Dec 9	33°C	21°C	35°C 2016	18°C 2011	16%
Dec 10	33°C	21°C	35°C 1997	19°C 2013	17%
Dec 11	33°C	21°C	35°C 2011	18°C 1996	18%
Dec 12	33°C	21°C	36°C 2013	18°C 1995	18%
Dec 13	33°C	21°C	35°C 1992	20°C 2007	18%
Dec 14	33°C	21°C	35°C 1995	20°C 2017	20%
Dec 15	33°C	21°C	36°C 1995	20°C 2017	21%
Dec 16	33°C	21°C	35°C 2008	20°C 2018	22%
Dec 17	33°C	21°C	34°C 2002	19°C 2004	23%
Dec 18	33°C	21°C	36°C 2012	20°C 2011	24%
Dec 19	33°C	21°C	36°C 2012	20°C 2008	24%
Dec 20	33°C	21°C	35°C 1993	19°C 2000	25%
Dec 21	33°C	21°C	36°C 1993	19°C 2000	26%
Dec 22	33°C	21°C	36°C 2002	18°C 1991	26%
Dec 23	33°C	21°C	37°C 2002	18°C 1991	27%
Dec 24	33°C	21°C	36°C 2002	20°C 2016	28%
Dec 25	33°C	21°C	37°C 2002	20°C 1991	28%
Dec 26	33°C	21°C	35°C 2012	19°C 2005	28%
Dec 27	33°C	21°C	35°C 1995	19°C 1992	29%
Dec 28	33°C	21°C	35°C 1995	20°C 2007	29%
Dec 29	33°C	21°C	36°C 1995	19°C 2000	30%
Dec 30	33°C	21°C	35°C 2018	19°C 2018	30%
Dec 31	33°C	21°C	35°C 1993	20°C 1992	31%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 4:53 AM, sunset 5:28 PM
December 31: sunrise 5:06 AM, sunset 5:43 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.