San Jose Weather in January
Average highs run from 27°C on January 1 to 27°C on January 31, and lows from 23°C to 23°C. Normal precipitation for the month is 62 mm over about 12 wet days.
January day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
January at a glance
- Average high
- 27°C
- Average low
- 23°C
- Precipitation
- 62 mm
- Reanalysis high
- 32°CJan 16, 1998
- Reanalysis low
- 19°CJan 26, 2014
- Daylight
- 11 h 25 min to 11 h 36 min
- Cloud cover
- 64%
- Humidity
- 84%
- Dew point
- 22°C
- Wind
- 20.5 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 |
|---|---|---|---|---|---|
| Jan 1 | 27°C | 23°C | 29°C 1991 | 21°C 1997 | 52% |
| Jan 2 | 27°C | 23°C | 28°C 2013 | 20°C 1997 | 50% |
| Jan 3 | 27°C | 23°C | 29°C 2010 | 21°C 1997 | 48% |
| Jan 4 | 27°C | 23°C | 29°C 2010 | 21°C 1997 | 46% |
| Jan 5 | 27°C | 23°C | 29°C 2010 | 21°C 2002 | 45% |
| Jan 6 | 27°C | 23°C | 29°C 2010 | 22°C 2002 | 46% |
| Jan 7 | 27°C | 23°C | 29°C 2010 | 22°C 1997 | 44% |
| Jan 8 | 27°C | 23°C | 28°C 2013 | 22°C 2002 | 43% |
| Jan 9 | 27°C | 23°C | 29°C 2010 | 21°C 2002 | 42% |
| Jan 10 | 27°C | 23°C | 29°C 1998 | 21°C 2015 | 42% |
| Jan 11 | 27°C | 23°C | 29°C 2016 | 21°C 2002 | 43% |
| Jan 12 | 27°C | 23°C | 30°C 2016 | 21°C 1995 | 44% |
| Jan 13 | 27°C | 23°C | 29°C 2016 | 21°C 1995 | 44% |
| Jan 14 | 27°C | 23°C | 29°C 1998 | 21°C 2009 | 44% |
| Jan 15 | 27°C | 23°C | 31°C 1998 | 21°C 2009 | 42% |
| Jan 16 | 27°C | 23°C | 32°C 1998 | 21°C 2005 | 42% |
| Jan 17 | 27°C | 23°C | 31°C 1998 | 21°C 1992 | 43% |
| Jan 18 | 27°C | 23°C | 31°C 1998 | 21°C 1992 | 44% |
| Jan 19 | 27°C | 23°C | 30°C 1998 | 21°C 2014 | 44% |
| Jan 20 | 27°C | 23°C | 30°C 1992 | 21°C 2014 | 44% |
| Jan 21 | 27°C | 23°C | 29°C 1992 | 21°C 2014 | 43% |
| Jan 22 | 27°C | 23°C | 29°C 2016 | 22°C 2010 | 42% |
| Jan 23 | 27°C | 23°C | 30°C 2003 | 21°C 2014 | 41% |
| Jan 24 | 27°C | 23°C | 29°C 1993 | 20°C 2014 | 40% |
| Jan 25 | 27°C | 23°C | 29°C 1992 | 19°C 2014 | 40% |
| Jan 26 | 27°C | 23°C | 30°C 2020 | 19°C 2014 | 39% |
| Jan 27 | 27°C | 23°C | 31°C 2020 | 21°C 2014 | 39% |
| Jan 28 | 27°C | 23°C | 30°C 2020 | 20°C 1993 | 38% |
| Jan 29 | 27°C | 23°C | 29°C 2020 | 21°C 2019 | 38% |
| Jan 30 | 27°C | 23°C | 29°C 2004 | 21°C 2007 | 39% |
| Jan 31 | 27°C | 23°C | 30°C 1992 | 21°C 2014 | 38% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+8).
- January 1
- sunrise 6:17 AM, sunset 5:42 PM
- January 31
- sunrise 6:21 AM, sunset 5:57 PM
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.