San Jose Weather in May
Average highs run from 30°C on May 1 to 30°C on May 31, and lows from 26°C to 27°C. Normal precipitation for the month is 133 mm over about 22 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 30°C
- Average low
- 26°C
- Precipitation
- 133 mm
- Reanalysis high
- 35°CMay 30, 1992
- Reanalysis low
- 24°CMay 29, 2004
- Daylight
- 12 h 29 min to 12 h 41 min
- Cloud cover
- 58%
- Humidity
- 82%
- Dew point
- 25°C
- Wind
- 11.2 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 |
|---|---|---|---|---|---|
| May 1 | 30°C | 26°C | 31°C 2014 | 24°C 1993 | 72% |
| May 2 | 30°C | 26°C | 32°C 1994 | 25°C 1991 | 72% |
| May 3 | 30°C | 26°C | 31°C 2013 | 25°C 1991 | 73% |
| May 4 | 30°C | 26°C | 32°C 2020 | 25°C 2011 | 74% |
| May 5 | 30°C | 26°C | 31°C 2020 | 25°C 2011 | 74% |
| May 6 | 30°C | 26°C | 32°C 1994 | 25°C 2011 | 73% |
| May 7 | 30°C | 26°C | 31°C 1996 | 25°C 2011 | 72% |
| May 8 | 30°C | 26°C | 32°C 1996 | 25°C 1993 | 72% |
| May 9 | 30°C | 26°C | 32°C 1996 | 25°C 1993 | 72% |
| May 10 | 30°C | 26°C | 32°C 2013 | 26°C 2018 | 71% |
| May 11 | 30°C | 26°C | 32°C 2013 | 26°C 2006 | 71% |
| May 12 | 30°C | 26°C | 31°C 1994 | 25°C 1991 | 70% |
| May 13 | 30°C | 26°C | 32°C 2013 | 25°C 1993 | 70% |
| May 14 | 30°C | 26°C | 32°C 1994 | 25°C 1993 | 70% |
| May 15 | 30°C | 26°C | 32°C 2014 | 25°C 1993 | 71% |
| May 16 | 30°C | 26°C | 32°C 1994 | 25°C 1993 | 71% |
| May 17 | 30°C | 26°C | 32°C 2017 | 25°C 1993 | 70% |
| May 18 | 30°C | 27°C | 33°C 2003 | 25°C 1993 | 68% |
| May 19 | 30°C | 27°C | 33°C 2019 | 25°C 1993 | 67% |
| May 20 | 30°C | 27°C | 33°C 2019 | 26°C 2010 | 67% |
| May 21 | 30°C | 27°C | 33°C 2002 | 25°C 2010 | 67% |
| May 22 | 30°C | 27°C | 32°C 1992 | 25°C 2008 | 67% |
| May 23 | 30°C | 27°C | 33°C 2010 | 26°C 2008 | 67% |
| May 24 | 30°C | 27°C | 33°C 1992 | 25°C 1991 | 68% |
| May 25 | 30°C | 27°C | 33°C 1992 | 26°C 1993 | 68% |
| May 26 | 30°C | 27°C | 33°C 1998 | 26°C 2006 | 68% |
| May 27 | 30°C | 27°C | 33°C 1992 | 26°C 2000 | 69% |
| May 28 | 30°C | 27°C | 33°C 1992 | 26°C 2000 | 69% |
| May 29 | 30°C | 27°C | 33°C 2005 | 24°C 2004 | 69% |
| May 30 | 30°C | 27°C | 35°C 1992 | 25°C 2004 | 69% |
| May 31 | 30°C | 27°C | 33°C 1992 | 26°C 2004 | 69% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+8).
- May 1
- sunrise 5:20 AM, sunset 5:49 PM
- May 31
- sunrise 5:15 AM, sunset 5:56 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.