Leblon Weather in December

NASA POWER reanalysis for the half-degree grid cell around Leblon, 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 28°C on December 31, and lows from 22°C to 23°C. Normal precipitation for the month is 220 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: 28°C
Average low: 23°C
Precipitation: 220 mm
Reanalysis high: 36°CDec 26, 2012
Reanalysis low: 19°CDec 15, 1992
Daylight: 13 h 26 min to 13 h 32 min
Cloud cover: 73%
Humidity: 84%
Dew point: 22°C
Wind: 11.9 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	27°C	22°C	35°C 2002	20°C 1995	67%
Dec 2	27°C	22°C	31°C 2014	20°C 2016	68%
Dec 3	27°C	22°C	32°C 2010	20°C 2005	68%
Dec 4	27°C	22°C	32°C 1994	19°C 2005	67%
Dec 5	27°C	22°C	34°C 2013	19°C 2005	66%
Dec 6	27°C	22°C	32°C 2007	20°C 1992	67%
Dec 7	27°C	22°C	34°C 2012	20°C 2008	67%
Dec 8	27°C	22°C	33°C 1993	19°C 2019	68%
Dec 9	27°C	22°C	32°C 2014	19°C 2018	68%
Dec 10	27°C	22°C	32°C 2014	19°C 2018	68%
Dec 11	27°C	22°C	34°C 2012	20°C 2011	68%
Dec 12	27°C	22°C	33°C 1998	20°C 2011	70%
Dec 13	28°C	22°C	33°C 2010	20°C 1992	69%
Dec 14	28°C	22°C	32°C 1994	19°C 1992	69%
Dec 15	28°C	23°C	32°C 1993	19°C 1992	70%
Dec 16	28°C	23°C	34°C 2003	20°C 2014	70%
Dec 17	28°C	23°C	32°C 1994	20°C 2014	71%
Dec 18	28°C	23°C	32°C 2014	21°C 2000	72%
Dec 19	28°C	23°C	33°C 2006	21°C 2000	72%
Dec 20	28°C	23°C	34°C 2006	21°C 2003	72%
Dec 21	28°C	23°C	36°C 2014	20°C 1993	72%
Dec 22	28°C	23°C	33°C 1998	20°C 1993	72%
Dec 23	28°C	23°C	34°C 1997	20°C 1993	72%
Dec 24	28°C	23°C	34°C 2005	20°C 1992	72%
Dec 25	28°C	23°C	35°C 2012	20°C 1992	73%
Dec 26	28°C	23°C	36°C 2012	20°C 1992	74%
Dec 27	28°C	23°C	34°C 1997	20°C 1992	74%
Dec 28	28°C	23°C	33°C 2014	20°C 1992	75%
Dec 29	28°C	23°C	33°C 2014	20°C 1992	76%
Dec 30	28°C	23°C	33°C 2016	21°C 2011	75%
Dec 31	28°C	23°C	34°C 2015	21°C 1993	74%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 4:59 AM, sunset 6:25 PM
December 31: sunrise 5:10 AM, sunset 6:42 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.