San José Weather in August
Average highs run from 28°C on August 1 to 28°C on August 31, and lows from 20°C to 20°C. Normal precipitation for the month is 166 mm over about 23 wet days.
August day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
August at a glance
- Average high
- 28°C
- Average low
- 20°C
- Precipitation
- 166 mm
- Reanalysis high
- 34°CAug 5, 1994
- Reanalysis low
- 18°CAug 25, 2004
- Daylight
- 12 h 46 min to 12 h 24 min
- Cloud cover
- 69%
- Humidity
- 86%
- Dew point
- 20°C
- Wind
- 5.0 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 |
|---|---|---|---|---|---|
| Aug 1 | 28°C | 20°C | 31°C 1991 | 19°C 1993 | 70% |
| Aug 2 | 28°C | 20°C | 32°C 1991 | 19°C 1992 | 70% |
| Aug 3 | 28°C | 20°C | 33°C 1994 | 19°C 1992 | 71% |
| Aug 4 | 28°C | 20°C | 33°C 1994 | 19°C 2001 | 71% |
| Aug 5 | 28°C | 20°C | 34°C 1994 | 19°C 2016 | 73% |
| Aug 6 | 28°C | 20°C | 31°C 2004 | 19°C 2000 | 73% |
| Aug 7 | 28°C | 20°C | 32°C 2019 | 19°C 2002 | 73% |
| Aug 8 | 28°C | 20°C | 32°C 1994 | 18°C 1993 | 75% |
| Aug 9 | 28°C | 20°C | 32°C 2015 | 18°C 1998 | 75% |
| Aug 10 | 28°C | 20°C | 31°C 1994 | 18°C 1993 | 75% |
| Aug 11 | 28°C | 20°C | 32°C 2004 | 18°C 1993 | 75% |
| Aug 12 | 28°C | 20°C | 31°C 2019 | 19°C 1995 | 76% |
| Aug 13 | 28°C | 20°C | 32°C 2019 | 18°C 1996 | 77% |
| Aug 14 | 28°C | 20°C | 32°C 2019 | 18°C 2001 | 78% |
| Aug 15 | 28°C | 20°C | 31°C 1994 | 19°C 2011 | 78% |
| Aug 16 | 28°C | 20°C | 32°C 1994 | 19°C 2003 | 78% |
| Aug 17 | 28°C | 20°C | 31°C 1991 | 18°C 2000 | 77% |
| Aug 18 | 28°C | 20°C | 33°C 2015 | 18°C 1996 | 77% |
| Aug 19 | 28°C | 20°C | 33°C 2015 | 19°C 1996 | 77% |
| Aug 20 | 28°C | 20°C | 31°C 2004 | 18°C 2014 | 76% |
| Aug 21 | 28°C | 20°C | 31°C 1994 | 19°C 2014 | 77% |
| Aug 22 | 28°C | 20°C | 30°C 2015 | 19°C 2000 | 76% |
| Aug 23 | 28°C | 20°C | 32°C 1994 | 19°C 2007 | 76% |
| Aug 24 | 28°C | 20°C | 33°C 1994 | 18°C 2008 | 77% |
| Aug 25 | 28°C | 20°C | 31°C 2015 | 18°C 2004 | 77% |
| Aug 26 | 28°C | 20°C | 31°C 2019 | 18°C 2014 | 77% |
| Aug 27 | 28°C | 20°C | 31°C 2004 | 18°C 2012 | 77% |
| Aug 28 | 28°C | 20°C | 31°C 1991 | 19°C 2008 | 77% |
| Aug 29 | 28°C | 20°C | 31°C 1991 | 19°C 1996 | 77% |
| Aug 30 | 28°C | 20°C | 30°C 2004 | 18°C 1996 | 79% |
| Aug 31 | 28°C | 20°C | 31°C 1996 | 18°C 1991 | 80% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- August 1
- sunrise 5:38 AM, sunset 6:24 PM
- August 31
- sunrise 5:43 AM, sunset 6:07 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.