Altamira Weather in December

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

Average highs run from 33°C on December 1 to 30°C on December 31, and lows from 25°C to 24°C. Normal precipitation for the month is 158 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: 32°C
Average low: 24°C
Precipitation: 158 mm
Reanalysis high: 39°CDec 1, 2015
Reanalysis low: 21°CDec 30, 1991
Daylight: 12 h 18 min to 12 h 18 min
Cloud cover: 74%
Humidity: 76%
Dew point: 23°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	33°C	25°C	39°C 2015	21°C 1996	43%
Dec 2	33°C	25°C	38°C 2015	22°C 1996	44%
Dec 3	33°C	25°C	37°C 1997	23°C 2008	44%
Dec 4	33°C	25°C	37°C 1997	23°C 2007	45%
Dec 5	33°C	25°C	37°C 1997	23°C 2008	46%
Dec 6	33°C	25°C	38°C 1997	23°C 2007	46%
Dec 7	33°C	25°C	37°C 2017	23°C 1998	47%
Dec 8	33°C	25°C	38°C 1997	22°C 1998	49%
Dec 9	33°C	25°C	37°C 2015	22°C 1996	51%
Dec 10	33°C	25°C	37°C 1991	23°C 2020	53%
Dec 11	32°C	25°C	37°C 1991	23°C 2020	55%
Dec 12	32°C	24°C	38°C 1991	23°C 2020	57%
Dec 13	32°C	24°C	37°C 2015	23°C 1996	59%
Dec 14	32°C	24°C	37°C 2015	22°C 1996	60%
Dec 15	32°C	24°C	37°C 2015	23°C 2018	63%
Dec 16	32°C	24°C	36°C 2015	23°C 2016	66%
Dec 17	31°C	24°C	36°C 1991	22°C 2000	68%
Dec 18	31°C	24°C	36°C 1991	22°C 2010	70%
Dec 19	31°C	24°C	36°C 1991	22°C 2008	72%
Dec 20	31°C	24°C	36°C 2004	23°C 1998	74%
Dec 21	31°C	24°C	35°C 2014	23°C 2000	76%
Dec 22	31°C	24°C	35°C 2011	22°C 2000	77%
Dec 23	31°C	24°C	35°C 1997	22°C 1999	79%
Dec 24	31°C	24°C	35°C 2001	23°C 1995	80%
Dec 25	30°C	24°C	35°C 2019	22°C 2008	80%
Dec 26	30°C	24°C	35°C 2014	21°C 2017	82%
Dec 27	30°C	24°C	35°C 2003	23°C 2009	83%
Dec 28	30°C	24°C	35°C 2011	23°C 1993	84%
Dec 29	30°C	24°C	36°C 2011	22°C 1993	85%
Dec 30	30°C	24°C	36°C 2011	21°C 1991	85%
Dec 31	30°C	24°C	36°C 2003	22°C 2009	85%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 6:09 AM, sunset 6:27 PM
December 31: sunrise 6:23 AM, sunset 6:41 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.