San Fernando Weather in December

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

Average highs run from 25°C on December 1 to 23°C on December 31, and lows from 14°C to 11°C. Normal precipitation for the month is 25 mm over about 6 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: 24°C
Average low: 12°C
Precipitation: 25 mm
Reanalysis high: 34°CDec 8, 2009
Reanalysis low: -1°CDec 25, 2004
Daylight: 10 h 43 min to 10 h 37 min
Cloud cover: 64%
Humidity: 73%
Dew point: 12°C
Wind: 17.3 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	25°C	14°C	31°C 1991	5°C 2006	15%
Dec 2	25°C	14°C	34°C 2007	6°C 2009	15%
Dec 3	25°C	14°C	32°C 1994	6°C 2009	15%
Dec 4	25°C	13°C	32°C 2005	2°C 2009	15%
Dec 5	25°C	13°C	33°C 1995	0°C 2009	16%
Dec 6	25°C	13°C	33°C 1994	4°C 2002	16%
Dec 7	25°C	13°C	32°C 1994	4°C 2013	16%
Dec 8	25°C	13°C	34°C 2009	1°C 2017	16%
Dec 9	25°C	13°C	33°C 2008	3°C 2005	16%
Dec 10	25°C	13°C	30°C 1993	5°C 2016	16%
Dec 11	24°C	13°C	32°C 2020	3°C 2008	15%
Dec 12	24°C	13°C	31°C 2001	4°C 1997	15%
Dec 13	24°C	12°C	33°C 2020	3°C 1997	14%
Dec 14	24°C	12°C	32°C 2019	4°C 1997	14%
Dec 15	24°C	12°C	32°C 2012	5°C 2004	14%
Dec 16	24°C	12°C	32°C 2019	5°C 2013	14%
Dec 17	24°C	12°C	33°C 1995	2°C 2003	14%
Dec 18	24°C	12°C	30°C 2012	2°C 1996	14%
Dec 19	24°C	12°C	33°C 2012	0°C 1996	14%
Dec 20	24°C	12°C	31°C 2008	5°C 2002	14%
Dec 21	24°C	12°C	32°C 2004	5°C 1999	14%
Dec 22	23°C	12°C	31°C 2001	4°C 1998	14%
Dec 23	23°C	12°C	33°C 2020	4°C 1998	14%
Dec 24	23°C	12°C	32°C 2015	1°C 2004	14%
Dec 25	23°C	12°C	30°C 2015	-1°C 2004	16%
Dec 26	23°C	11°C	30°C 2015	2°C 2004	16%
Dec 27	23°C	11°C	33°C 2008	6°C 1997	17%
Dec 28	23°C	11°C	31°C 1996	4°C 2000	18%
Dec 29	23°C	11°C	31°C 2010	2°C 1997	18%
Dec 30	23°C	11°C	34°C 2010	4°C 2000	17%
Dec 31	23°C	11°C	33°C 2010	6°C 2013	16%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (CST).

December 1: sunrise 7:00 AM, sunset 5:43 PM
December 31: sunrise 7:17 AM, sunset 5:54 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.