Ulianópolis Weather in December

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

Average highs run from 34°C on December 1 to 31°C on December 31, and lows from 24°C to 23°C. Normal precipitation for the month is 130 mm over about 19 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: 24°C
Precipitation: 130 mm
Reanalysis high: 39°CDec 3, 2019
Reanalysis low: 21°CDec 17, 2000
Daylight: 12 h 20 min to 12 h 20 min
Cloud cover: 73%
Humidity: 73%
Dew point: 22°C
Wind: 2.9 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	34°C	24°C	39°C 2015	21°C 1995	50%
Dec 2	34°C	24°C	39°C 2015	22°C 2004	49%
Dec 3	34°C	24°C	39°C 2019	21°C 2006	48%
Dec 4	34°C	24°C	39°C 2017	22°C 2011	48%
Dec 5	34°C	24°C	38°C 1997	22°C 1996	49%
Dec 6	34°C	24°C	39°C 1997	22°C 2018	50%
Dec 7	34°C	24°C	39°C 1997	22°C 2018	51%
Dec 8	34°C	24°C	39°C 1997	22°C 1995	52%
Dec 9	34°C	24°C	39°C 1997	21°C 1996	53%
Dec 10	34°C	24°C	39°C 1997	22°C 2007	54%
Dec 11	34°C	24°C	38°C 2017	22°C 2020	55%
Dec 12	34°C	24°C	39°C 1991	22°C 2005	57%
Dec 13	34°C	24°C	38°C 1991	22°C 2005	58%
Dec 14	33°C	24°C	37°C 2015	22°C 2001	60%
Dec 15	33°C	24°C	38°C 1991	22°C 2017	61%
Dec 16	33°C	24°C	38°C 1991	22°C 2000	62%
Dec 17	33°C	24°C	37°C 2013	21°C 2000	65%
Dec 18	33°C	23°C	36°C 1995	21°C 2000	69%
Dec 19	33°C	23°C	37°C 2019	21°C 2010	70%
Dec 20	32°C	23°C	37°C 2019	21°C 2017	71%
Dec 21	32°C	23°C	38°C 2019	21°C 2000	72%
Dec 22	32°C	23°C	37°C 2014	22°C 1999	73%
Dec 23	32°C	23°C	37°C 2019	21°C 1999	74%
Dec 24	32°C	23°C	38°C 2019	22°C 1991	76%
Dec 25	32°C	23°C	37°C 2001	21°C 2018	77%
Dec 26	32°C	23°C	37°C 2019	22°C 2000	78%
Dec 27	32°C	23°C	37°C 2015	22°C 2008	78%
Dec 28	32°C	23°C	36°C 2015	22°C 2018	78%
Dec 29	32°C	23°C	37°C 2015	22°C 2005	77%
Dec 30	31°C	23°C	37°C 2015	21°C 2005	76%
Dec 31	31°C	23°C	36°C 2013	22°C 1999	77%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:49 AM, sunset 6:09 PM
December 31: sunrise 6:03 AM, sunset 6:23 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.