Sonoma weather in December: Sonoma, California: normal highs, lows, rain and records for December
Sonoma in December has a normal high of 57°F and a normal low of 38°F, a daily mean of 47°F, falling from 59°F on the 1st to 56°F by the 31st. Measurable precipitation falls on 12 days in a normal December, 5.83 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 3°C, 148 mm of precipitation in December.
- 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 December?
The normal high is 57°F and the normal low 38°F, for a daily mean of 47.4°F. December is 6.1°F cooler than November and 0.3°F cooler than January. December is the 12th warmest month of the year in Sonoma and the wettest. Across the month the normal high falls 3°F, from 59°F on December 1 to 56°F on December 31. From one year to the next December's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 45°F and 49°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 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 59°F | 39°F | 34% | 24% |
| December 8 | 58°F | 39°F | 36% | 26% |
| December 15 | 56°F | 38°F | 37% | 28% |
| December 22 | 56°F | 38°F | 37% | 28% |
| December 31 | 56°F | 38°F | 37% | 28% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 23)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 59°F | 39°F | 34% | 24% | 9 h 40 min |
| December 2 | 59°F | 39°F | 34% | 24% | 9 h 40 min |
| December 3 | 59°F | 39°F | 35% | 25% | 9 h 40 min |
| December 4 | 58°F | 39°F | 35% | 25% | 9 h 40 min |
| December 5 | 58°F | 39°F | 35% | 25% | 9 h 40 min |
| December 6 | 58°F | 39°F | 36% | 26% | 9 h 40 min |
| December 7 | 58°F | 39°F | 36% | 26% | 9 h 40 min |
| December 8 | 58°F | 39°F | 36% | 26% | 9 h 40 min |
| December 9 | 57°F | 39°F | 36% | 26% | 9 h 40 min |
| December 10 | 57°F | 38°F | 37% | 27% | 9 h 30 min |
| December 11 | 57°F | 38°F | 37% | 27% | 9 h 30 min |
| December 12 | 57°F | 38°F | 37% | 27% | 9 h 30 min |
| December 13 | 57°F | 38°F | 37% | 27% | 9 h 30 min |
| December 14 | 57°F | 38°F | 37% | 27% | 9 h 30 min |
| December 15 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 16 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 17 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 18 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 19 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 20 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 21 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 22 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 23 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 24 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 25 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 26 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 27 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 28 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 29 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 30 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
| December 31 | 56°F | 38°F | 37% | 28% | 9 h 30 min |
- Normal high
- 57°FDecember average
- Normal low
- 38°FDecember average
- Precipitation
- 5.83 inmonth total
- Days with precipitation
- 120.01 inch or more
- Nights at 32°F or colder
- 8
- Daylight
- 9 h 40 min to 9 h 30 minDecember 1 to December 31
- Sunshine
- 72%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 December?
On a given December day the chance of 0.01 inch or more is 36% on average, highest around December 14 (37%). In all, 5.83 in falls on 12 days of a normal December, 2 of them with an inch or more.
In a normal December in Sonoma, 8 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00048351.
What are the records for December in Sonoma?
The warmest December temperature on this station's record (since 1893) is 80°F, on December 26, 1967; the coldest is 13°F, on December 22, 1990. The wettest December brought 16.87 in (1955).
The December mean against the 1991-2020 normal of 47.4°F: 2021 47.4°F (at normal), 2022 46.7°F (−0.7), 2023 50.6°F (+3.2), 2024 50.6°F (+3.2), 2025 48.6°F (+1.2). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.4°F | at normal | 5.36 in |
| 2022 | 46.7°F | −0.7°F | 8.14 in |
| 2023 | 50.6°F | +3.2°F | 4.18 in |
| 2024 | 50.6°F | +3.2°F | 6.91 in |
| 2025 | 48.6°F | +1.2°F | 7.06 in |
Source: records: ACIS, station USC00048351; recent months: ACIS, station USC00048351. Records and recent months use complete months only.
How does December in Sonoma compare across California?
Across the 219 places PlainClimate covers in California, December normal highs run from 38°F in Tahoma to 71°F in Anaheim; Sonoma's is 57°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.