San Rafael Weather in August
Average highs run from 35°C on August 1 to 34°C on August 31, and lows from 27°C to 27°C. Normal precipitation for the month is 62 mm over about 12 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
- 34°C
- Average low
- 27°C
- Precipitation
- 62 mm
- Reanalysis high
- 40°CAug 7, 2016
- Reanalysis low
- 24°CAug 9, 1997
- Daylight
- 12 h 36 min to 12 h 20 min
- Cloud cover
- 43%
- Humidity
- 67%
- Dew point
- 23°C
- Wind
- 20.2 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 |
|---|---|---|---|---|---|
| Aug 1 | 35°C | 27°C | 38°C 2016 | 26°C 1992 | 32% |
| Aug 2 | 35°C | 27°C | 37°C 2004 | 26°C 1999 | 33% |
| Aug 3 | 35°C | 27°C | 37°C 2002 | 25°C 1992 | 33% |
| Aug 4 | 35°C | 27°C | 38°C 2006 | 25°C 1991 | 33% |
| Aug 5 | 35°C | 27°C | 37°C 2011 | 26°C 1993 | 34% |
| Aug 6 | 35°C | 27°C | 37°C 2016 | 26°C 1992 | 35% |
| Aug 7 | 35°C | 27°C | 40°C 2016 | 25°C 1996 | 35% |
| Aug 8 | 35°C | 27°C | 38°C 2016 | 25°C 1993 | 36% |
| Aug 9 | 35°C | 27°C | 39°C 2019 | 24°C 1997 | 36% |
| Aug 10 | 35°C | 27°C | 38°C 2019 | 25°C 1993 | 36% |
| Aug 11 | 35°C | 27°C | 38°C 2019 | 25°C 2005 | 36% |
| Aug 12 | 35°C | 27°C | 38°C 2019 | 26°C 1996 | 36% |
| Aug 13 | 35°C | 27°C | 37°C 2004 | 25°C 1996 | 36% |
| Aug 14 | 35°C | 27°C | 37°C 2016 | 26°C 2000 | 36% |
| Aug 15 | 35°C | 27°C | 38°C 2016 | 26°C 1995 | 37% |
| Aug 16 | 34°C | 27°C | 37°C 1991 | 25°C 1992 | 37% |
| Aug 17 | 34°C | 27°C | 37°C 2018 | 25°C 1997 | 38% |
| Aug 18 | 34°C | 27°C | 37°C 2018 | 26°C 2008 | 38% |
| Aug 19 | 34°C | 27°C | 38°C 2019 | 25°C 1993 | 38% |
| Aug 20 | 34°C | 27°C | 38°C 2019 | 25°C 1996 | 38% |
| Aug 21 | 34°C | 27°C | 38°C 2016 | 26°C 1992 | 39% |
| Aug 22 | 34°C | 27°C | 38°C 2001 | 25°C 2004 | 39% |
| Aug 23 | 34°C | 27°C | 38°C 2018 | 25°C 1996 | 39% |
| Aug 24 | 34°C | 27°C | 37°C 2019 | 25°C 1996 | 39% |
| Aug 25 | 34°C | 27°C | 38°C 2019 | 26°C 1993 | 40% |
| Aug 26 | 34°C | 27°C | 37°C 2009 | 25°C 1996 | 41% |
| Aug 27 | 34°C | 27°C | 37°C 1997 | 24°C 1996 | 42% |
| Aug 28 | 34°C | 27°C | 37°C 2001 | 25°C 1996 | 42% |
| Aug 29 | 34°C | 27°C | 38°C 1997 | 25°C 2014 | 43% |
| Aug 30 | 34°C | 27°C | 39°C 2016 | 26°C 2000 | 44% |
| Aug 31 | 34°C | 27°C | 37°C 2015 | 26°C 2007 | 45% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-4).
- August 1
- sunrise 6:35 AM, sunset 7:11 PM
- August 31
- sunrise 6:37 AM, sunset 6:57 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.