Sonoma weather in October: Sonoma, California: normal highs, lows, rain and records for October
Sonoma in October has a normal high of 78°F and a normal low of 47°F, a daily mean of 63°F, falling from 82°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 4 days in a normal October, 1.52 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 9°C, 39 mm of precipitation in October.
- NOAA stationSonoma
- Station IDUSC00048351
- Location38.30°N 122.46°W
- Elevation97 ft (30 m)
- Population10,606
- Jan 57° 38°
- Feb 62° 40°
- Mar 65° 42°
- Apr 69° 44°
- May 75° 48°
- Jun 83° 51°
- Jul 86° 54°
- Aug 86° 53°
- Sep 85° 51°
- Oct 78° 47°
- Nov 65° 42°
- Dec 57° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sonoma in October?
The normal high is 78°F and the normal low 47°F, for a daily mean of 62.5°F. October is 5.5°F cooler than September and 9.0°F warmer than November. October is the 5th warmest month of the year in Sonoma and the 7th wettest. Across the month the normal high falls 10°F, from 82°F on October 1 to 72°F on October 31. From one year to the next October's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 61°F and 64°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 18%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 82°F | 50°F | 6% | 3% |
| October 8 | 80°F | 49°F | 8% | 5% |
| October 15 | 78°F | 48°F | 11% | 7% |
| October 22 | 76°F | 46°F | 14% | 9% |
| October 31 | 72°F | 45°F | 18% | 12% |
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 | 82°F | 50°F | 6% | 3% | 11 h 50 min |
| October 2 | 82°F | 50°F | 6% | 3% | 11 h 50 min |
| October 3 | 82°F | 50°F | 7% | 4% | 11 h 50 min |
| October 4 | 81°F | 49°F | 7% | 4% | 11 h 40 min |
| October 5 | 81°F | 49°F | 7% | 4% | 11 h 40 min |
| October 6 | 81°F | 49°F | 7% | 4% | 11 h 40 min |
| October 7 | 81°F | 49°F | 8% | 5% | 11 h 40 min |
| October 8 | 80°F | 49°F | 8% | 5% | 11 h 30 min |
| October 9 | 80°F | 49°F | 8% | 5% | 11 h 30 min |
| October 10 | 80°F | 49°F | 9% | 5% | 11 h 30 min |
| October 11 | 79°F | 48°F | 9% | 6% | 11 h 30 min |
| October 12 | 79°F | 48°F | 9% | 6% | 11 h 20 min |
| October 13 | 79°F | 48°F | 10% | 6% | 11 h 20 min |
| October 14 | 78°F | 48°F | 10% | 7% | 11 h 20 min |
| October 15 | 78°F | 48°F | 11% | 7% | 11 h 20 min |
| October 16 | 78°F | 48°F | 11% | 7% | 11 h 10 min |
| October 17 | 77°F | 47°F | 12% | 8% | 11 h 10 min |
| October 18 | 77°F | 47°F | 12% | 8% | 11 h 10 min |
| October 19 | 77°F | 47°F | 12% | 8% | 11 h 10 min |
| October 20 | 76°F | 47°F | 13% | 9% | 11 h |
| October 21 | 76°F | 47°F | 13% | 9% | 11 h |
| October 22 | 76°F | 46°F | 14% | 9% | 11 h |
| October 23 | 75°F | 46°F | 14% | 10% | 11 h |
| October 24 | 75°F | 46°F | 15% | 10% | 10 h 50 min |
| October 25 | 74°F | 46°F | 15% | 10% | 10 h 50 min |
| October 26 | 74°F | 46°F | 16% | 11% | 10 h 50 min |
| October 27 | 74°F | 45°F | 16% | 11% | 10 h 50 min |
| October 28 | 73°F | 45°F | 17% | 11% | 10 h 50 min |
| October 29 | 73°F | 45°F | 17% | 12% | 10 h 40 min |
| October 30 | 72°F | 45°F | 18% | 12% | 10 h 40 min |
| October 31 | 72°F | 45°F | 18% | 12% | 10 h 40 min |
- Normal high
- 78°FOctober average
- Normal low
- 47°FOctober average
- Precipitation
- 1.52 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
- 26
- Days at 80°F or more
- 13
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00048351; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Sonoma in October?
On a given October day the chance of 0.01 inch or more is 11% on average, highest around October 31 (18%). In all, 1.52 in falls on 4 days of a normal October, 1 of them with an inch or more.
In a normal October in Sonoma, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00048351.
What are the records for October in Sonoma?
The warmest October temperature on this station's record (since 1893) is 107°F, on October 2, 1980; the coldest is 30°F, on October 24, 1956. The wettest October brought 9.12 in (1962).
The October mean against the 1991-2020 normal of 62.5°F: 2021 61.7°F (−0.8), 2022 63.6°F (+1.1), 2023 63.8°F (+1.3), 2024 66.3°F (+3.8), 2025 62.0°F (−0.5). 3 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.7°F | −0.8°F | 3.56 in |
| 2022 | 63.6°F | +1.1°F | 0.00 in |
| 2023 | 63.8°F | +1.3°F | 0.16 in |
| 2024 | 66.3°F | +3.8°F | 0.08 in |
| 2025 | 62.0°F | −0.5°F | 1.15 in |
Source: records: ACIS, station USC00048351; recent months: ACIS, station USC00048351. Records and recent months use complete months only.
How does October in Sonoma 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; Sonoma's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.