San Pedro Weather in December

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

Average highs run from 27°C on December 1 to 27°C on December 31, and lows from 24°C to 23°C. Normal precipitation for the month is 99 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: 27°C
Average low: 23°C
Precipitation: 99 mm
Reanalysis high: 30°CDec 17, 2019
Reanalysis low: 17°CDec 14, 2010
Daylight: 11 h 08 min to 11 h 04 min
Cloud cover: 48%
Humidity: 81%
Dew point: 21°C
Wind: 10.4 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	27°C	24°C	29°C 1994	18°C 2011	55%
Dec 2	27°C	24°C	30°C 2019	21°C 2010	55%
Dec 3	27°C	24°C	30°C 2009	21°C 2008	54%
Dec 4	27°C	24°C	30°C 1994	21°C 2010	54%
Dec 5	27°C	24°C	30°C 2016	21°C 2000	54%
Dec 6	27°C	24°C	29°C 1994	20°C 2000	53%
Dec 7	27°C	24°C	30°C 2016	19°C 2003	53%
Dec 8	27°C	23°C	29°C 2004	20°C 2020	52%
Dec 9	27°C	23°C	30°C 2004	19°C 2020	50%
Dec 10	27°C	23°C	30°C 1993	18°C 2017	48%
Dec 11	27°C	23°C	30°C 2019	18°C 2017	47%
Dec 12	27°C	23°C	30°C 2019	18°C 2008	46%
Dec 13	27°C	23°C	30°C 2019	18°C 2008	46%
Dec 14	27°C	23°C	30°C 1993	17°C 2010	46%
Dec 15	27°C	23°C	29°C 2019	17°C 1997	45%
Dec 16	27°C	23°C	29°C 2019	19°C 1997	44%
Dec 17	27°C	23°C	30°C 2019	20°C 1997	44%
Dec 18	27°C	23°C	29°C 2012	19°C 2003	44%
Dec 19	27°C	23°C	29°C 1995	19°C 2003	44%
Dec 20	27°C	23°C	30°C 2018	18°C 2003	44%
Dec 21	27°C	23°C	30°C 1994	19°C 2009	45%
Dec 22	27°C	23°C	29°C 1994	18°C 2018	45%
Dec 23	27°C	23°C	30°C 1993	21°C 1994	46%
Dec 24	27°C	23°C	30°C 2004	19°C 1994	48%
Dec 25	27°C	23°C	30°C 2004	18°C 2019	51%
Dec 26	27°C	23°C	30°C 2012	19°C 2020	52%
Dec 27	27°C	23°C	29°C 2009	17°C 2010	53%
Dec 28	27°C	23°C	29°C 2012	19°C 1999	52%
Dec 29	27°C	23°C	30°C 2012	19°C 1999	52%
Dec 30	27°C	23°C	29°C 2019	18°C 1997	53%
Dec 31	27°C	23°C	29°C 1995	19°C 2000	53%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (CST).

December 1: sunrise 6:07 AM, sunset 5:15 PM
December 31: sunrise 6:23 AM, sunset 5:27 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.