Fairfield weather in December: Fairfield, California: normal highs, lows, rain and records for December
Fairfield in December has a normal high of 57°F and a normal low of 40°F, a daily mean of 48°F, falling from 60°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 5.40 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 5°C, 137 mm of precipitation in December.
- NOAA stationFairfield
- Station IDUSC00042934
- Location38.27°N 122.07°W
- Elevation40 ft (12 m)
- Population122,646
- Jan 57° 40°
- Feb 62° 43°
- Mar 66° 45°
- Apr 71° 48°
- May 78° 52°
- Jun 85° 56°
- Jul 90° 58°
- Aug 89° 58°
- Sep 87° 57°
- Oct 78° 52°
- Nov 66° 45°
- Dec 57° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Fairfield in December?
The normal high is 57°F and the normal low 40°F, for a daily mean of 48.4°F. December is 7.0°F cooler than November and 0.1°F cooler than January. December is the 12th warmest month of the year in Fairfield and the wettest. Across the month the normal high falls 5°F, from 60°F on December 1 to 55°F on December 31. From one year to the next December's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 46°F and 51°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 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 60°F | 42°F | 29% | 22% |
| December 8 | 58°F | 41°F | 31% | 24% |
| December 15 | 56°F | 40°F | 33% | 25% |
| December 22 | 56°F | 40°F | 33% | 24% |
| December 31 | 55°F | 40°F | 33% | 24% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 22)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 60°F | 42°F | 29% | 22% | 9 h 40 min |
| December 2 | 59°F | 42°F | 30% | 22% | 9 h 40 min |
| December 3 | 59°F | 41°F | 30% | 22% | 9 h 40 min |
| December 4 | 59°F | 41°F | 30% | 23% | 9 h 40 min |
| December 5 | 58°F | 41°F | 31% | 23% | 9 h 40 min |
| December 6 | 58°F | 41°F | 31% | 23% | 9 h 40 min |
| December 7 | 58°F | 41°F | 31% | 23% | 9 h 40 min |
| December 8 | 58°F | 41°F | 31% | 24% | 9 h 40 min |
| December 9 | 58°F | 41°F | 32% | 24% | 9 h 40 min |
| December 10 | 57°F | 40°F | 32% | 24% | 9 h 30 min |
| December 11 | 57°F | 40°F | 32% | 24% | 9 h 30 min |
| December 12 | 57°F | 40°F | 32% | 24% | 9 h 30 min |
| December 13 | 57°F | 40°F | 32% | 24% | 9 h 30 min |
| December 14 | 57°F | 40°F | 32% | 25% | 9 h 30 min |
| December 15 | 56°F | 40°F | 33% | 25% | 9 h 30 min |
| December 16 | 56°F | 40°F | 33% | 25% | 9 h 30 min |
| December 17 | 56°F | 40°F | 33% | 25% | 9 h 30 min |
| December 18 | 56°F | 40°F | 33% | 25% | 9 h 30 min |
| December 19 | 56°F | 40°F | 33% | 24% | 9 h 30 min |
| December 20 | 56°F | 40°F | 33% | 24% | 9 h 30 min |
| December 21 | 56°F | 40°F | 33% | 24% | 9 h 30 min |
| December 22 | 56°F | 40°F | 33% | 24% | 9 h 30 min |
| December 23 | 56°F | 40°F | 33% | 24% | 9 h 30 min |
| December 24 | 56°F | 40°F | 33% | 24% | 9 h 30 min |
| December 25 | 56°F | 40°F | 33% | 24% | 9 h 30 min |
| December 26 | 55°F | 40°F | 33% | 24% | 9 h 30 min |
| December 27 | 55°F | 40°F | 33% | 24% | 9 h 30 min |
| December 28 | 55°F | 40°F | 33% | 24% | 9 h 30 min |
| December 29 | 55°F | 40°F | 33% | 24% | 9 h 30 min |
| December 30 | 55°F | 40°F | 33% | 24% | 9 h 30 min |
| December 31 | 55°F | 40°F | 33% | 24% | 9 h 30 min |
- Normal high
- 57°FDecember average
- Normal low
- 40°FDecember average
- Precipitation
- 5.40 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 4
- 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 USC00042934; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Fairfield in December?
On a given December day the chance of 0.01 inch or more is 32% on average, highest around December 31 (33%). In all, 5.40 in falls on 10 days of a normal December, 2 of them with an inch or more.
In a normal December in Fairfield, 4 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00042934.
What are the records for December in Fairfield?
The warmest December temperature on this station's record (since 1950) is 78°F, on December 1, 1977; the coldest is 15°F, on December 25, 2011. The wettest December brought 16.69 in (2005); the snowiest, 1.5 inches (1988).
The December mean against the 1991-2020 normal of 48.4°F: 2021 47.5°F (−0.9), 2022 47.0°F (−1.4), 2023 52.8°F (+4.4), 2024 50.4°F (+2.0), 2025 47.8°F (−0.6). 2 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.5°F | −0.9°F | 8.89 in |
| 2022 | 47.0°F | −1.4°F | 10.66 in |
| 2023 | 52.8°F | +4.4°F | 2.16 in |
| 2024 | 50.4°F | +2.0°F | 6.18 in |
| 2025 | 47.8°F | −0.6°F | 4.46 in |
Source: records: ACIS, station USC00042934; recent months: ACIS, station USC00042934. Records and recent months use complete months only.
How does December in Fairfield 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; Fairfield's is 57°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Fairfield in November66°F by day, 45°F at night
- Fairfield in January57°F by day, 40°F at night
- Fairfield through the yearEvery month, frost dates, records and recent years
- California in DecemberThe statewide normal and the warmest and coolest places
- Anaheim: California's warmest Decembernormal high 71°F