San José Weather in August
Average highs run from 30°C on August 1 to 30°C on August 31, and lows from 24°C to 24°C. Normal precipitation for the month is 148 mm over about 19 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
- 30°C
- Average low
- 24°C
- Precipitation
- 148 mm
- Reanalysis high
- 35°CAug 28, 2015
- Reanalysis low
- 21°CAug 19, 1991
- Daylight
- 12 h 36 min to 12 h 20 min
- Cloud cover
- 82%
- Humidity
- 83%
- Dew point
- 23°C
- Wind
- 6.5 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 |
|---|---|---|---|---|---|
| Aug 1 | 30°C | 24°C | 34°C 2001 | 23°C 2017 | 53% |
| Aug 2 | 30°C | 24°C | 34°C 1996 | 22°C 1992 | 55% |
| Aug 3 | 30°C | 24°C | 34°C 1996 | 23°C 1999 | 55% |
| Aug 4 | 30°C | 24°C | 34°C 1996 | 23°C 1999 | 55% |
| Aug 5 | 30°C | 24°C | 34°C 1994 | 22°C 1999 | 54% |
| Aug 6 | 30°C | 24°C | 33°C 1994 | 23°C 2000 | 54% |
| Aug 7 | 30°C | 24°C | 33°C 2015 | 23°C 2009 | 55% |
| Aug 8 | 30°C | 24°C | 34°C 1995 | 22°C 2009 | 56% |
| Aug 9 | 30°C | 24°C | 33°C 2015 | 22°C 1996 | 57% |
| Aug 10 | 30°C | 24°C | 33°C 1996 | 22°C 1996 | 57% |
| Aug 11 | 30°C | 24°C | 34°C 1994 | 23°C 1992 | 58% |
| Aug 12 | 30°C | 24°C | 33°C 1994 | 22°C 1992 | 58% |
| Aug 13 | 30°C | 24°C | 34°C 2015 | 23°C 1992 | 58% |
| Aug 14 | 30°C | 24°C | 34°C 1994 | 23°C 2011 | 58% |
| Aug 15 | 30°C | 24°C | 32°C 1994 | 23°C 1999 | 58% |
| Aug 16 | 30°C | 24°C | 33°C 1993 | 22°C 2009 | 58% |
| Aug 17 | 30°C | 24°C | 33°C 1996 | 22°C 1996 | 58% |
| Aug 18 | 30°C | 24°C | 33°C 1996 | 23°C 1994 | 59% |
| Aug 19 | 30°C | 24°C | 34°C 2001 | 21°C 1991 | 61% |
| Aug 20 | 30°C | 24°C | 34°C 1991 | 22°C 1991 | 62% |
| Aug 21 | 30°C | 24°C | 33°C 2015 | 22°C 1994 | 63% |
| Aug 22 | 30°C | 24°C | 33°C 2004 | 23°C 1992 | 64% |
| Aug 23 | 30°C | 24°C | 34°C 1994 | 22°C 1991 | 64% |
| Aug 24 | 30°C | 24°C | 33°C 2015 | 21°C 1991 | 65% |
| Aug 25 | 30°C | 24°C | 34°C 2015 | 23°C 2008 | 65% |
| Aug 26 | 30°C | 24°C | 35°C 2015 | 23°C 2008 | 65% |
| Aug 27 | 30°C | 24°C | 35°C 1997 | 23°C 1993 | 66% |
| Aug 28 | 30°C | 24°C | 35°C 2015 | 23°C 1993 | 68% |
| Aug 29 | 30°C | 24°C | 35°C 2015 | 22°C 1996 | 70% |
| Aug 30 | 30°C | 24°C | 34°C 1994 | 23°C 1994 | 70% |
| Aug 31 | 30°C | 24°C | 34°C 1996 | 22°C 2013 | 70% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- August 1
- sunrise 5:29 AM, sunset 6:05 PM
- August 31
- sunrise 5:31 AM, sunset 5:51 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.