Santo Ângelo Weather in December

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

Average highs run from 30°C on December 1 to 32°C on December 31, and lows from 17°C to 19°C. Normal precipitation for the month is 164 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: 32°C
Average low: 18°C
Precipitation: 164 mm
Reanalysis high: 42°CDec 18, 1995
Reanalysis low: 8°CDec 14, 2010
Daylight: 13 h 48 min to 13 h 54 min
Cloud cover: 55%
Humidity: 72%
Dew point: 18°C
Wind: 8.6 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	30°C	17°C	39°C 1995	9°C 2011	41%
Dec 2	30°C	17°C	38°C 1995	9°C 2011	40%
Dec 3	31°C	17°C	38°C 2012	9°C 2018	40%
Dec 4	31°C	17°C	37°C 1991	10°C 2008	40%
Dec 5	31°C	17°C	36°C 1991	12°C 2009	41%
Dec 6	31°C	17°C	37°C 1995	11°C 2003	42%
Dec 7	31°C	17°C	38°C 1995	10°C 2005	44%
Dec 8	31°C	17°C	36°C 2008	9°C 2018	42%
Dec 9	31°C	17°C	35°C 2012	12°C 1995	43%
Dec 10	31°C	17°C	37°C 2020	10°C 2003	42%
Dec 11	31°C	17°C	39°C 2020	12°C 2005	42%
Dec 12	31°C	17°C	37°C 2020	12°C 2007	42%
Dec 13	31°C	17°C	37°C 2018	10°C 2010	43%
Dec 14	31°C	18°C	36°C 2019	8°C 2010	45%
Dec 15	32°C	18°C	38°C 1995	10°C 2016	45%
Dec 16	32°C	18°C	40°C 1995	12°C 2003	46%
Dec 17	32°C	18°C	41°C 1995	10°C 2003	47%
Dec 18	32°C	18°C	42°C 1995	11°C 2000	46%
Dec 19	32°C	18°C	40°C 1995	12°C 1998	46%
Dec 20	32°C	18°C	40°C 1995	15°C 1993	46%
Dec 21	32°C	18°C	40°C 2011	11°C 1993	46%
Dec 22	32°C	18°C	41°C 2011	12°C 2020	47%
Dec 23	32°C	19°C	38°C 2011	11°C 1998	49%
Dec 24	32°C	19°C	38°C 2020	13°C 2019	49%
Dec 25	32°C	19°C	40°C 2013	13°C 2002	50%
Dec 26	32°C	19°C	40°C 2013	12°C 2005	52%
Dec 27	32°C	19°C	40°C 1999	13°C 2005	52%
Dec 28	32°C	19°C	42°C 2019	14°C 2012	50%
Dec 29	32°C	19°C	41°C 2019	13°C 1993	49%
Dec 30	32°C	19°C	41°C 2019	11°C 1993	48%
Dec 31	32°C	19°C	39°C 2019	12°C 1993	47%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:32 AM, sunset 7:20 PM
December 31: sunrise 5:43 AM, sunset 7:37 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.