San Diego Weather in January
Average highs run from 28°C on January 1 to 30°C on January 31, and lows from 17°C to 16°C. Normal precipitation for the month is 6 mm over about 1 wet days.
January day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 29°C
- Average low
- 16°C
- Precipitation
- 6 mm
- Record high
- 41°CJan 16, 2010
- Record low
- 17°CJan 9, 1974
- Daylight
- 11 h 32 min to 11 h 41 min
- Cloud cover
- 44%
- Humidity
- 75%
- Dew point
- 16°C
- Wind
- 7.6 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 |
|---|---|---|---|---|---|
| Jan 1 | 28°C | 17°C | 36°C 2019 | 23°C 2000 | 6% |
| Jan 2 | 28°C | 17°C | 36°C 2020 | 21°C 1991 | 5% |
| Jan 3 | 28°C | 17°C | 37°C 2013 | 22°C 2010 | 5% |
| Jan 4 | 28°C | 17°C | 37°C 2020 | 21°C 2001 | 4% |
| Jan 5 | 28°C | 17°C | 38°C 2019 | 21°C 2010 | 5% |
| Jan 6 | 28°C | 17°C | 38°C 2013 | 20°C 1979 | 5% |
| Jan 7 | 28°C | 17°C | 37°C 2013 | 19°C 1979 | 5% |
| Jan 8 | 28°C | 17°C | 38°C 2019 | 20°C 1982 | 4% |
| Jan 9 | 28°C | 17°C | 38°C 2013 | 17°C 1974 | 5% |
| Jan 10 | 28°C | 17°C | 38°C 1973 | 20°C 1979 | 5% |
| Jan 11 | 28°C | 16°C | 38°C 1973 | 20°C 1995 | 5% |
| Jan 12 | 28°C | 16°C | 36°C 2015 | 19°C 1976 | 4% |
| Jan 13 | 29°C | 16°C | 36°C 2015 | 19°C 1976 | 4% |
| Jan 14 | 29°C | 16°C | 37°C 2020 | 18°C 1976 | 4% |
| Jan 15 | 29°C | 16°C | 36°C 2015 | 20°C 1976 | 4% |
| Jan 16 | 29°C | 16°C | 41°C 2010 | 21°C 2010 | 4% |
| Jan 17 | 29°C | 16°C | 37°C 2024 | 21°C 1979 | 4% |
| Jan 18 | 29°C | 16°C | 36°C 2013 | 18°C 2000 | 4% |
| Jan 19 | 29°C | 16°C | 38°C 2010 | 21°C 2012 | 4% |
| Jan 20 | 29°C | 16°C | 35°C 1979 | 20°C 1979 | 4% |
| Jan 21 | 29°C | 16°C | 38°C 2022 | 20°C 1978 | 4% |
| Jan 22 | 29°C | 16°C | 36°C 2013 | 20°C 1976 | 3% |
| Jan 23 | 29°C | 16°C | 36°C 1979 | 17°C 1979 | 3% |
| Jan 24 | 29°C | 16°C | 36°C 2010 | 21°C 1971 | 3% |
| Jan 25 | 29°C | 16°C | 39°C 2019 | 22°C 2001 | 3% |
| Jan 26 | 29°C | 16°C | 38°C 2019 | 20°C 1982 | 3% |
| Jan 27 | 29°C | 16°C | 37°C 2013 | 21°C 1973 | 3% |
| Jan 28 | 29°C | 16°C | 38°C 1973 | 21°C 1978 | 2% |
| Jan 29 | 29°C | 16°C | 37°C 2019 | 21°C 2000 | 2% |
| Jan 30 | 30°C | 16°C | 38°C 1979 | 21°C 2000 | 2% |
| Jan 31 | 30°C | 16°C | 38°C 1979 | 19°C 1976 | 3% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-5).
- January 1
- sunrise 6:10 AM, sunset 5:42 PM
- January 31
- sunrise 6:16 AM, sunset 5:57 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.