Osório Weather in December

NASA POWER reanalysis for the half-degree grid cell around Osório, 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 28°C on December 31, and lows from 17°C to 20°C. Normal precipitation for the month is 118 mm over about 16 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: 18°C
Precipitation: 118 mm
Reanalysis high: 36°CDec 25, 2012
Reanalysis low: 10°CDec 14, 2010
Daylight: 13 h 55 min to 14 h 02 min
Cloud cover: 62%
Humidity: 79%
Dew point: 19°C
Wind: 12.2 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	17°C	32°C 1995	13°C 2016	45%
Dec 2	26°C	17°C	32°C 1994	13°C 2019	44%
Dec 3	27°C	17°C	33°C 2012	12°C 2018	44%
Dec 4	27°C	17°C	35°C 2012	12°C 2018	43%
Dec 5	27°C	17°C	34°C 1991	13°C 2009	43%
Dec 6	27°C	17°C	36°C 2012	13°C 1999	44%
Dec 7	27°C	18°C	34°C 2012	12°C 2015	46%
Dec 8	27°C	18°C	34°C 2014	13°C 2018	46%
Dec 9	27°C	18°C	32°C 2008	13°C 2018	48%
Dec 10	27°C	18°C	36°C 2012	11°C 2003	48%
Dec 11	27°C	18°C	34°C 2020	14°C 2005	48%
Dec 12	27°C	18°C	34°C 1994	14°C 2017	47%
Dec 13	27°C	18°C	33°C 2006	13°C 2007	48%
Dec 14	27°C	18°C	33°C 2006	10°C 2010	48%
Dec 15	27°C	18°C	34°C 2006	13°C 2016	48%
Dec 16	28°C	18°C	34°C 2006	14°C 1992	50%
Dec 17	28°C	18°C	35°C 2006	14°C 2003	51%
Dec 18	28°C	19°C	35°C 1995	12°C 2000	50%
Dec 19	28°C	19°C	33°C 2006	14°C 1998	50%
Dec 20	28°C	19°C	36°C 2012	15°C 1998	49%
Dec 21	28°C	19°C	32°C 1995	15°C 2004	48%
Dec 22	28°C	19°C	34°C 2011	15°C 1998	47%
Dec 23	28°C	19°C	34°C 1992	14°C 1998	48%
Dec 24	28°C	19°C	34°C 2012	14°C 2019	47%
Dec 25	28°C	19°C	36°C 2012	15°C 2005	46%
Dec 26	28°C	19°C	33°C 2013	14°C 2005	48%
Dec 27	28°C	19°C	35°C 1999	16°C 2005	48%
Dec 28	28°C	19°C	33°C 2019	16°C 1992	48%
Dec 29	28°C	19°C	35°C 2019	16°C 2011	48%
Dec 30	28°C	20°C	34°C 2004	16°C 1993	47%
Dec 31	28°C	20°C	36°C 2006	15°C 2003	47%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:13 AM, sunset 7:08 PM
December 31: sunrise 5:23 AM, sunset 7:25 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.