San José Weather in May
Average highs run from 30°C on May 1 to 29°C on May 31, and lows from 25°C to 25°C. Normal precipitation for the month is 249 mm over about 26 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
- 25°C
- Precipitation
- 249 mm
- Reanalysis high
- 34°CMay 1, 2013
- Reanalysis low
- 22°CMay 17, 2011
- Daylight
- 12 h 26 min to 12 h 35 min
- Cloud cover
- 79%
- Humidity
- 84%
- Dew point
- 24°C
- Wind
- 10.1 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 | 25°C | 34°C 2013 | 24°C 2006 | 71% |
| May 2 | 30°C | 25°C | 32°C 1994 | 24°C 1999 | 73% |
| May 3 | 30°C | 25°C | 32°C 1994 | 24°C 1999 | 75% |
| May 4 | 30°C | 25°C | 32°C 1994 | 24°C 2008 | 75% |
| May 5 | 30°C | 25°C | 32°C 2001 | 24°C 2008 | 76% |
| May 6 | 30°C | 25°C | 33°C 1993 | 24°C 2008 | 76% |
| May 7 | 30°C | 25°C | 32°C 2001 | 24°C 2013 | 76% |
| May 8 | 30°C | 25°C | 32°C 1993 | 24°C 2013 | 77% |
| May 9 | 30°C | 25°C | 32°C 2015 | 24°C 2000 | 78% |
| May 10 | 30°C | 25°C | 33°C 1998 | 24°C 1999 | 80% |
| May 11 | 30°C | 25°C | 33°C 1998 | 24°C 2014 | 80% |
| May 12 | 30°C | 25°C | 33°C 2015 | 24°C 1999 | 81% |
| May 13 | 30°C | 25°C | 32°C 1998 | 24°C 1999 | 83% |
| May 14 | 30°C | 25°C | 32°C 2013 | 24°C 1992 | 83% |
| May 15 | 30°C | 25°C | 33°C 1998 | 24°C 1992 | 84% |
| May 16 | 29°C | 25°C | 32°C 1998 | 23°C 2011 | 85% |
| May 17 | 29°C | 25°C | 32°C 1998 | 22°C 2011 | 86% |
| May 18 | 29°C | 25°C | 32°C 2010 | 24°C 2011 | 86% |
| May 19 | 29°C | 25°C | 31°C 2001 | 24°C 2011 | 87% |
| May 20 | 29°C | 25°C | 32°C 1998 | 24°C 2008 | 88% |
| May 21 | 29°C | 25°C | 31°C 2001 | 24°C 2011 | 89% |
| May 22 | 29°C | 25°C | 32°C 1998 | 24°C 2013 | 90% |
| May 23 | 29°C | 25°C | 31°C 2015 | 24°C 1991 | 90% |
| May 24 | 29°C | 25°C | 31°C 1998 | 24°C 2008 | 90% |
| May 25 | 29°C | 25°C | 31°C 1997 | 24°C 2008 | 90% |
| May 26 | 29°C | 25°C | 31°C 1992 | 24°C 2007 | 91% |
| May 27 | 29°C | 25°C | 31°C 2014 | 24°C 2008 | 92% |
| May 28 | 29°C | 25°C | 31°C 2013 | 24°C 2008 | 92% |
| May 29 | 29°C | 25°C | 31°C 2010 | 24°C 2008 | 93% |
| May 30 | 29°C | 25°C | 31°C 2010 | 24°C 2008 | 93% |
| May 31 | 29°C | 25°C | 31°C 1992 | 24°C 1996 | 93% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EST).
- May 1
- sunrise 6:04 AM, sunset 6:30 PM
- May 31
- sunrise 6:00 AM, sunset 6:35 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 2026-09-28. Sun and moon: computed with the NOAA solar equations and Meeus.