Santa Rosa Weather in October
Average highs run from 34°C on October 1 to 35°C on October 31, and lows from 18°C to 20°C. Normal precipitation for the month is 50 mm over about 6 wet days.
October day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
October at a glance
- Average high
- 35°C
- Average low
- 20°C
- Precipitation
- 50 mm
- Reanalysis high
- 47°COct 16, 2014
- Reanalysis low
- 8°COct 4, 1999
- Daylight
- 12 h 19 min to 12 h 58 min
- Cloud cover
- 64%
- Humidity
- 45%
- Dew point
- 12°C
- Wind
- 13.3 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 |
|---|---|---|---|---|---|
| Oct 1 | 34°C | 18°C | 44°C 2007 | 9°C 2009 | 14% |
| Oct 2 | 34°C | 18°C | 43°C 2002 | 12°C 1999 | 13% |
| Oct 3 | 34°C | 18°C | 42°C 2005 | 10°C 1999 | 14% |
| Oct 4 | 34°C | 18°C | 42°C 1998 | 8°C 1999 | 14% |
| Oct 5 | 34°C | 18°C | 44°C 2009 | 10°C 1999 | 15% |
| Oct 6 | 34°C | 19°C | 41°C 2002 | 12°C 1999 | 16% |
| Oct 7 | 35°C | 19°C | 42°C 2011 | 10°C 1991 | 16% |
| Oct 8 | 35°C | 19°C | 43°C 2018 | 9°C 1991 | 17% |
| Oct 9 | 35°C | 19°C | 44°C 2014 | 12°C 1991 | 17% |
| Oct 10 | 35°C | 19°C | 43°C 1998 | 13°C 2015 | 17% |
| Oct 11 | 35°C | 19°C | 44°C 1997 | 11°C 2003 | 17% |
| Oct 12 | 35°C | 19°C | 44°C 2019 | 11°C 2015 | 18% |
| Oct 13 | 35°C | 19°C | 42°C 1991 | 12°C 2015 | 19% |
| Oct 14 | 35°C | 20°C | 42°C 1991 | 12°C 1995 | 20% |
| Oct 15 | 35°C | 20°C | 46°C 2014 | 12°C 2019 | 22% |
| Oct 16 | 35°C | 20°C | 47°C 2014 | 12°C 2019 | 24% |
| Oct 17 | 35°C | 20°C | 43°C 2017 | 13°C 1991 | 25% |
| Oct 18 | 35°C | 20°C | 45°C 2017 | 14°C 2010 | 25% |
| Oct 19 | 35°C | 20°C | 43°C 2020 | 16°C 2008 | 25% |
| Oct 20 | 35°C | 20°C | 43°C 2012 | 15°C 2019 | 26% |
| Oct 21 | 35°C | 20°C | 43°C 2000 | 15°C 2002 | 26% |
| Oct 22 | 35°C | 20°C | 43°C 2000 | 12°C 2002 | 27% |
| Oct 23 | 35°C | 20°C | 42°C 2009 | 13°C 2017 | 28% |
| Oct 24 | 35°C | 20°C | 42°C 2003 | 14°C 1991 | 29% |
| Oct 25 | 35°C | 20°C | 44°C 2020 | 12°C 1998 | 30% |
| Oct 26 | 35°C | 20°C | 44°C 2019 | 17°C 2005 | 31% |
| Oct 27 | 35°C | 20°C | 46°C 2019 | 16°C 2003 | 32% |
| Oct 28 | 35°C | 20°C | 47°C 2019 | 15°C 2016 | 32% |
| Oct 29 | 35°C | 20°C | 45°C 2019 | 13°C 1992 | 32% |
| Oct 30 | 35°C | 20°C | 43°C 2009 | 13°C 1995 | 32% |
| Oct 31 | 35°C | 20°C | 44°C 2009 | 13°C 2005 | 32% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- October 1
- sunrise 6:58 AM, sunset 7:17 PM
- October 31
- sunrise 6:32 AM, sunset 7:30 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.