Mãe do Rio Weather in December

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

Average highs run from 35°C on December 1 to 33°C on December 31, and lows from 23°C to 23°C. Normal precipitation for the month is 136 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: 34°C
Average low: 23°C
Precipitation: 136 mm
Reanalysis high: 40°CDec 1, 2015
Reanalysis low: 20°CDec 23, 1998
Daylight: 12 h 14 min to 12 h 14 min
Cloud cover: 68%
Humidity: 78%
Dew point: 22°C
Wind: 4.3 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	35°C	23°C	40°C 2015	21°C 1994	48%
Dec 2	35°C	23°C	40°C 2015	21°C 2006	49%
Dec 3	35°C	23°C	38°C 2014	21°C 1996	50%
Dec 4	35°C	23°C	39°C 2017	21°C 1994	52%
Dec 5	35°C	23°C	39°C 2017	21°C 1996	53%
Dec 6	35°C	23°C	39°C 2017	22°C 1994	54%
Dec 7	35°C	23°C	38°C 1997	21°C 2013	56%
Dec 8	35°C	23°C	38°C 1997	21°C 1993	57%
Dec 9	35°C	23°C	38°C 2015	21°C 1996	60%
Dec 10	35°C	23°C	38°C 2015	22°C 2010	60%
Dec 11	34°C	23°C	38°C 2017	21°C 2020	61%
Dec 12	34°C	23°C	38°C 1991	21°C 2005	63%
Dec 13	34°C	23°C	38°C 2015	21°C 2005	64%
Dec 14	34°C	23°C	38°C 1991	22°C 1996	67%
Dec 15	34°C	23°C	38°C 1991	21°C 1996	68%
Dec 16	34°C	23°C	38°C 1991	21°C 1996	70%
Dec 17	34°C	23°C	37°C 1991	21°C 1996	71%
Dec 18	34°C	23°C	37°C 2015	21°C 1992	72%
Dec 19	33°C	23°C	37°C 1991	21°C 2016	73%
Dec 20	33°C	23°C	37°C 1991	21°C 2016	74%
Dec 21	33°C	23°C	36°C 2001	21°C 2000	75%
Dec 22	33°C	23°C	37°C 2014	21°C 2020	77%
Dec 23	33°C	23°C	36°C 2015	20°C 1998	78%
Dec 24	33°C	23°C	37°C 2001	21°C 1999	78%
Dec 25	33°C	23°C	37°C 2001	22°C 2009	80%
Dec 26	33°C	23°C	37°C 2014	20°C 1991	81%
Dec 27	33°C	23°C	38°C 2015	21°C 2000	81%
Dec 28	33°C	23°C	36°C 2015	21°C 2006	81%
Dec 29	33°C	23°C	38°C 2015	22°C 2005	81%
Dec 30	33°C	23°C	38°C 2015	21°C 2002	82%
Dec 31	33°C	23°C	38°C 2017	21°C 1991	84%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:52 AM, sunset 6:06 PM
December 31: sunrise 6:06 AM, sunset 6:20 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.