San Francisco De Borja Weather in December

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

Average highs run from 22°C on December 1 to 23°C on December 31, and lows from 15°C to 16°C. Normal precipitation for the month is 3 mm over about 0 wet days.

December day by day

The normal high and low for each date, and the record, in °C.

Normal low
Normal high
Record high
Record low

December at a glance

Average high: 23°C
Average low: 16°C
Precipitation: 3 mm
Record high: 30°CDec 29, 1982
Record low: 14°CDec 2, 1968
Daylight: 12 h 47 min to 12 h 50 min
Cloud cover: 79%
Humidity: 72%
Dew point: 13°C
Wind: 11.9 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	Record high	Record low	Chance wet
Dec 1	22°C	15°C	26°C 1982	15°C 1986	1%
Dec 2	22°C	15°C	26°C 1982	14°C 1968	1%
Dec 3	22°C	15°C	28°C 1987	14°C 1974	1%
Dec 4	22°C	15°C	28°C 1997	16°C 1992	1%
Dec 5	22°C	15°C	27°C 1997	15°C 1965	1%
Dec 6	22°C	15°C	28°C 1997	16°C 1966	1%
Dec 7	22°C	15°C	27°C 1988	15°C 1967	1%
Dec 8	22°C	15°C	30°C 1982	16°C 1973	1%
Dec 9	22°C	15°C	26°C 1976	16°C 1981	1%
Dec 10	22°C	15°C	29°C 1997	15°C 1978	1%
Dec 11	22°C	15°C	29°C 1982	16°C 1968	0%
Dec 12	22°C	15°C	27°C 1979	14°C 1978	0%
Dec 13	22°C	15°C	29°C 1997	15°C 1974	0%
Dec 14	22°C	15°C	29°C 1997	16°C 1975	0%
Dec 15	23°C	16°C	29°C 1982	15°C 1978	0%
Dec 16	23°C	16°C	27°C 2004	14°C 1978	0%
Dec 17	23°C	16°C	29°C 1982	16°C 1989	0%
Dec 18	23°C	16°C	30°C 1997	17°C 1995	0%
Dec 19	23°C	16°C	30°C 1997	16°C 1973	0%
Dec 20	23°C	16°C	29°C 1997	16°C 1978	1%
Dec 21	23°C	16°C	29°C 1997	14°C 1978	1%
Dec 22	23°C	16°C	30°C 1997	17°C 1995	1%
Dec 23	23°C	16°C	27°C 1976	16°C 1974	1%
Dec 24	23°C	16°C	28°C 1997	14°C 1967	1%
Dec 25	23°C	16°C	30°C 1982	17°C 1978	1%
Dec 26	23°C	16°C	30°C 1997	17°C 1976	1%
Dec 27	23°C	16°C	30°C 1982	17°C 1968	1%
Dec 28	23°C	16°C	29°C 2009	17°C 1988	1%
Dec 29	23°C	16°C	30°C 1982	16°C 1973	1%
Dec 30	23°C	16°C	30°C 1997	17°C 2001	1%
Dec 31	23°C	16°C	30°C 1997	17°C 1964	1%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-5).

December 1: sunrise 5:34 AM, sunset 6:21 PM
December 31: sunrise 5:46 AM, sunset 6:36 PM

Every day of December: sun and moon

Other months

Sources

Records: NOAA GHCN-Daily, station PEM00084628, every year on file, quality-flagged values removed. 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.