Santa Rosa, CA weather in October
In October, Santa Rosa sees highs around 78°F and lows around 44°F: mild and mostly dry. There are about 4 days with rain. Good for outdoor plans.
- Normal high
- 78°F
- Normal low
- 44°F
- Wet days
- 4
- 2.0 in total
- Muggy days
- 0
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 82°F | 74°F |
| Normal low | 46°F | 42°F |
| Chance of a wet day | 10% | 19% |
| Sunrise / sunset | 7:06 am / 6:54 pm | 7:36 am / 6:12 pm |
| Daylight | 11.8 h | 10.6 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical October day
- 6 am53°Fdew point 46°F
- 9 am64°Fdew point 47°F
- Noon74°Fdew point 45°F
- 3 pm77°Fdew point 44°F
- 6 pm67°Fdew point 46°F
- 9 pm60°Fdew point 47°F
NOAA hourly normals (local standard time) from Travis AFB (44 mi away); average wind 10 mph; clear or few clouds in 75% of daytime hours, mostly cloudy or overcast in 18%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F15 of 31
- Hot dayshigh 90°F or more4 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow4 of 31
- Notable rainat least 0.10 in3 of 31
- Freezing nightslow 32°F or below1 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 2.0 in; a dry October brings about 0.4 in and a wet one about 2.3 in (25th and 75th percentiles). About 1 day brings half an inch or more, and about 1 an inch or more. Snow is very rare.
How October varies from year to year
- Warmest October, 1991-20202020: average high 86°F
- Coolest October2000: average high 74°F
- Wettest October2010: 8.7 in
- Driest October1995: no measurable precipitation
- Highest reading106°F (October 3, 2012)
- Lowest reading29°F (October 31, 2002)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 84°F | 78°F | 67°F |
| Normal low | 48°F | 44°F | 40°F |
| Wet days | 2 | 4 | 9 |
| Comfortable days | 9 | 15 | 18 |
| Daylight | 12.4 h | 11.2 h | 10.1 h |
Highs change by -6°F from September and -11°F into November.
Nearby alternatives in October
- Cooler: San Francisco, CA49 mi · high 70°F · 4 wet days
How Santa Rosa ranks in October
- Normal high124th warmest of 378 cities; 35th of 60 in California
- Wet days76th driest of 378
- Comfortable days66th most of 340
What to pack for Santa Rosa in October
- Layers – afternoons near 78°F but nights near 44°F
Heating and cooling
October has 143 heating degree days and 25 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Santa Rosa in October?
The normal high is 78°F and the normal low is 44°F. From 1991 to 2020 the hottest October reading was 106°F (October 3, 2012).
Does it rain a lot in Santa Rosa in October?
About 4 days in October have at least 0.01 in of precipitation, and the normal total is 2.0 in. The wettest October in 1991-2020 was in 2010 (8.7 in); the driest was in 1995, with no measurable precipitation.
Is October a good time to visit Santa Rosa?
October ranks 8th of 12 months on our comfort score for Santa Rosa (65 out of 100). It has about 15 comfortable days and about 4 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature and rain: Graton (USC00043578), 8.2 mi W of the city center, 200 ft . NOAA normals and daily records, 1991-2020.
- Snowfall, snow depth and frost dates: Santa Rosa (USC00047965), 1.1 mi N of the city center, 166 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Travis AFB (USW00023202), 44 mi ESE of the city center, 59 ft (106 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Sonoma County Airport (724957-23213), 6.8 mi NW of the city center, 119 ft . Hourly observations, 1991-2020.