San Diego Weather in December
Average highs run from 28°C on December 1 to 28°C on December 31, and lows from 18°C to 17°C. Normal precipitation for the month is 30 mm over about 4 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
- 28°C
- Average low
- 17°C
- Precipitation
- 30 mm
- Record high
- 38°CDec 11, 2012
- Record low
- 17°CDec 28, 1980
- Daylight
- 11 h 34 min to 11 h 32 min
- Cloud cover
- 55%
- Humidity
- 80%
- Dew point
- 17°C
- Wind
- 6.8 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 | 28°C | 18°C | 36°C 2018 | 21°C 1975 | 22% |
| Dec 2 | 28°C | 18°C | 36°C 2018 | 22°C 1999 | 22% |
| Dec 3 | 28°C | 18°C | 36°C 2019 | 21°C 1999 | 21% |
| Dec 4 | 28°C | 18°C | 36°C 2018 | 22°C 1977 | 20% |
| Dec 5 | 28°C | 18°C | 36°C 2012 | 21°C 1977 | 19% |
| Dec 6 | 28°C | 18°C | 35°C 2013 | 21°C 2018 | 18% |
| Dec 7 | 28°C | 18°C | 36°C 2019 | 20°C 1973 | 18% |
| Dec 8 | 28°C | 18°C | 36°C 2019 | 21°C 2022 | 18% |
| Dec 9 | 28°C | 18°C | 36°C 2018 | 22°C 1975 | 18% |
| Dec 10 | 28°C | 18°C | 36°C 2018 | 22°C 2022 | 17% |
| Dec 11 | 28°C | 18°C | 38°C 2012 | 22°C 1992 | 16% |
| Dec 12 | 28°C | 17°C | 36°C 2018 | 22°C 1981 | 16% |
| Dec 13 | 28°C | 17°C | 37°C 2012 | 22°C 1975 | 16% |
| Dec 14 | 28°C | 17°C | 36°C 2018 | 20°C 2005 | 16% |
| Dec 15 | 28°C | 17°C | 37°C 2012 | 20°C 2005 | 15% |
| Dec 16 | 28°C | 17°C | 37°C 2018 | 21°C 1977 | 14% |
| Dec 17 | 28°C | 17°C | 35°C 2013 | 20°C 1975 | 14% |
| Dec 18 | 28°C | 17°C | 37°C 2019 | 20°C 1973 | 13% |
| Dec 19 | 28°C | 17°C | 37°C 2018 | 21°C 1977 | 13% |
| Dec 20 | 28°C | 17°C | 37°C 2012 | 20°C 1978 | 13% |
| Dec 21 | 28°C | 17°C | 36°C 2019 | 19°C 1977 | 12% |
| Dec 22 | 28°C | 17°C | 36°C 2013 | 20°C 1975 | 11% |
| Dec 23 | 28°C | 17°C | 38°C 2018 | 21°C 1979 | 9% |
| Dec 24 | 28°C | 17°C | 36°C 2019 | 20°C 1978 | 8% |
| Dec 25 | 28°C | 17°C | 37°C 2019 | 21°C 1978 | 8% |
| Dec 26 | 28°C | 17°C | 36°C 1978 | 20°C 1975 | 8% |
| Dec 27 | 28°C | 17°C | 36°C 2012 | 19°C 2024 | 7% |
| Dec 28 | 28°C | 17°C | 37°C 2013 | 17°C 1980 | 7% |
| Dec 29 | 28°C | 17°C | 37°C 2019 | 21°C 2004 | 8% |
| Dec 30 | 28°C | 17°C | 37°C 2013 | 19°C 1975 | 7% |
| Dec 31 | 28°C | 17°C | 36°C 2018 | 19°C 1976 | 6% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-5).
- December 1
- sunrise 5:55 AM, sunset 5:29 PM
- December 31
- sunrise 6:10 AM, sunset 5:42 PM
Other months
Sources
Records: NOAA GHCN-Daily, station COM00080036, 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.