Santa Rosa weather in October: Santa Rosa, California: normal highs, lows, rain and records for October
Santa Rosa in October has a normal high of 77°F and a normal low of 46°F, a daily mean of 61°F, falling from 81°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 4 days in a normal October, 1.65 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 8°C, 42 mm of precipitation in October.
- NOAA stationSanta Rosa Sonoma County Airport
- Station IDUSW00023213
- Location38.50°N 122.81°W
- Elevation114 ft (35 m)
- Population177,524
- Jan 58° 38°
- Feb 62° 39°
- Mar 65° 41°
- Apr 69° 43°
- May 75° 47°
- Jun 82° 50°
- Jul 84° 52°
- Aug 84° 52°
- Sep 83° 50°
- Oct 77° 46°
- Nov 65° 40°
- Dec 58° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Santa Rosa in October?
The normal high is 77°F and the normal low 46°F, for a daily mean of 61.3°F. October is 5.2°F cooler than September and 8.5°F warmer than November. October is the 5th warmest month of the year in Santa Rosa and the 7th wettest. Across the month the normal high falls 9°F, from 81°F on October 1 to 72°F on October 31. From one year to the next October's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 59°F and 63°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 22%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 81°F | 48°F | 9% | 4% |
| October 8 | 80°F | 47°F | 11% | 6% |
| October 15 | 78°F | 46°F | 14% | 8% |
| October 22 | 76°F | 45°F | 17% | 10% |
| October 31 | 72°F | 43°F | 22% | 14% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 81°F | 48°F | 9% | 4% | 11 h 50 min |
| October 2 | 81°F | 48°F | 10% | 5% | 11 h 50 min |
| October 3 | 81°F | 48°F | 10% | 5% | 11 h 50 min |
| October 4 | 80°F | 47°F | 10% | 5% | 11 h 40 min |
| October 5 | 80°F | 47°F | 10% | 5% | 11 h 40 min |
| October 6 | 80°F | 47°F | 11% | 5% | 11 h 40 min |
| October 7 | 80°F | 47°F | 11% | 5% | 11 h 40 min |
| October 8 | 80°F | 47°F | 11% | 6% | 11 h 30 min |
| October 9 | 79°F | 47°F | 12% | 6% | 11 h 30 min |
| October 10 | 79°F | 47°F | 12% | 6% | 11 h 30 min |
| October 11 | 79°F | 46°F | 12% | 6% | 11 h 30 min |
| October 12 | 79°F | 46°F | 13% | 7% | 11 h 20 min |
| October 13 | 78°F | 46°F | 13% | 7% | 11 h 20 min |
| October 14 | 78°F | 46°F | 14% | 7% | 11 h 20 min |
| October 15 | 78°F | 46°F | 14% | 8% | 11 h 20 min |
| October 16 | 77°F | 46°F | 14% | 8% | 11 h 10 min |
| October 17 | 77°F | 45°F | 15% | 8% | 11 h 10 min |
| October 18 | 77°F | 45°F | 15% | 9% | 11 h 10 min |
| October 19 | 77°F | 45°F | 16% | 9% | 11 h 10 min |
| October 20 | 76°F | 45°F | 16% | 9% | 11 h |
| October 21 | 76°F | 45°F | 17% | 10% | 11 h |
| October 22 | 76°F | 45°F | 17% | 10% | 11 h |
| October 23 | 75°F | 44°F | 18% | 11% | 11 h |
| October 24 | 75°F | 44°F | 18% | 11% | 10 h 50 min |
| October 25 | 75°F | 44°F | 19% | 11% | 10 h 50 min |
| October 26 | 74°F | 44°F | 20% | 12% | 10 h 50 min |
| October 27 | 74°F | 44°F | 20% | 12% | 10 h 50 min |
| October 28 | 73°F | 43°F | 21% | 12% | 10 h 50 min |
| October 29 | 73°F | 43°F | 21% | 13% | 10 h 40 min |
| October 30 | 73°F | 43°F | 22% | 13% | 10 h 40 min |
| October 31 | 72°F | 43°F | 22% | 14% | 10 h 40 min |
- Normal high
- 77°FOctober average
- Normal low
- 46°FOctober average
- Precipitation
- 1.65 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 11 h 50 min to 10 h 40 minOctober 1 to October 31
- Days at 70°F or more
- 24
- Days at 80°F or more
- 13
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023213; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Santa Rosa in October?
On a given October day the chance of 0.01 inch or more is 15% on average, highest around October 31 (22%). In all, 1.65 in falls on 4 days of a normal October, 1 of them with an inch or more.
In a normal October in Santa Rosa, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023213.
What are the records for October in Santa Rosa?
The warmest October temperature on this station's record (since 1998) is 106°F, on October 1, 2024; the coldest is 27°F, on October 30, 2019. The wettest October brought 10.77 in (2021).
The October mean against the 1991-2020 normal of 61.3°F: 2021 59.4°F (−1.9), 2022 61.0°F (−0.3), 2023 62.7°F (+1.4), 2024 65.1°F (+3.8), 2025 60.9°F (−0.4). 2 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 59.4°F | −1.9°F | 10.77 in |
| 2022 | 61.0°F | −0.3°F | 0.01 in |
| 2023 | 62.7°F | +1.4°F | 0.65 in |
| 2024 | 65.1°F | +3.8°F | 0.44 in |
| 2025 | 60.9°F | −0.4°F | 1.95 in |
Source: records: ACIS, station USW00023213; recent months: ACIS, station USW00023213. Records and recent months use complete months only.
How does October in Santa Rosa compare across California?
Across the 219 places PlainClimate covers in California, October normal highs run from 58°F in Tahoma to 93°F in Brawley; Santa Rosa's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Santa Rosa in September83°F by day, 50°F at night
- Santa Rosa in November65°F by day, 40°F at night
- Santa Rosa through the yearEvery month, frost dates, records and recent years
- California in OctoberThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Octobernormal high 93°F