San José Weather in May
Average highs run from 34°C on May 1 to 31°C on May 31, and lows from 24°C to 24°C. Normal precipitation for the month is 152 mm over about 17 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
- 33°C
- Average low
- 24°C
- Precipitation
- 152 mm
- Reanalysis high
- 37°CMay 9, 1998
- Reanalysis low
- 21°CMay 8, 2013
- Daylight
- 12 h 31 min to 12 h 43 min
- Cloud cover
- 78%
- Humidity
- 74%
- Dew point
- 22°C
- Wind
- 7.2 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 | 34°C | 24°C | 36°C 2013 | 23°C 2006 | 33% |
| May 2 | 34°C | 24°C | 36°C 2016 | 22°C 2000 | 35% |
| May 3 | 34°C | 24°C | 36°C 2001 | 23°C 2000 | 36% |
| May 4 | 34°C | 24°C | 37°C 1998 | 23°C 2008 | 37% |
| May 5 | 34°C | 24°C | 36°C 2018 | 23°C 2010 | 37% |
| May 6 | 34°C | 24°C | 36°C 2015 | 23°C 1999 | 38% |
| May 7 | 34°C | 24°C | 37°C 1998 | 22°C 1999 | 38% |
| May 8 | 34°C | 24°C | 37°C 1998 | 21°C 2013 | 40% |
| May 9 | 34°C | 25°C | 37°C 1998 | 22°C 2000 | 41% |
| May 10 | 33°C | 24°C | 37°C 1998 | 22°C 2000 | 42% |
| May 11 | 33°C | 25°C | 36°C 1998 | 23°C 2014 | 45% |
| May 12 | 33°C | 25°C | 36°C 1994 | 23°C 2014 | 47% |
| May 13 | 33°C | 25°C | 36°C 2011 | 22°C 2014 | 50% |
| May 14 | 33°C | 25°C | 36°C 1994 | 22°C 2014 | 52% |
| May 15 | 33°C | 25°C | 36°C 1994 | 23°C 1992 | 53% |
| May 16 | 33°C | 25°C | 36°C 1998 | 22°C 2008 | 55% |
| May 17 | 32°C | 25°C | 36°C 1998 | 23°C 2008 | 56% |
| May 18 | 32°C | 25°C | 36°C 1994 | 23°C 2008 | 58% |
| May 19 | 32°C | 25°C | 35°C 2001 | 23°C 2008 | 60% |
| May 20 | 32°C | 24°C | 36°C 2001 | 23°C 2014 | 61% |
| May 21 | 32°C | 24°C | 35°C 2016 | 23°C 1999 | 62% |
| May 22 | 32°C | 24°C | 36°C 2016 | 23°C 1999 | 64% |
| May 23 | 32°C | 24°C | 36°C 2016 | 23°C 2011 | 66% |
| May 24 | 31°C | 24°C | 36°C 2016 | 23°C 1995 | 68% |
| May 25 | 31°C | 24°C | 35°C 2016 | 23°C 2008 | 68% |
| May 26 | 31°C | 24°C | 35°C 1994 | 23°C 2011 | 67% |
| May 27 | 31°C | 24°C | 35°C 2014 | 22°C 2008 | 68% |
| May 28 | 31°C | 24°C | 34°C 1994 | 23°C 2008 | 68% |
| May 29 | 31°C | 24°C | 35°C 2014 | 23°C 1999 | 68% |
| May 30 | 31°C | 24°C | 34°C 2014 | 23°C 2010 | 70% |
| May 31 | 31°C | 24°C | 35°C 1998 | 23°C 1996 | 68% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- May 1
- sunrise 5:22 AM, sunset 5:53 PM
- May 31
- sunrise 5:17 AM, sunset 6:00 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.