Eureka weather in December: Eureka, California: normal highs, lows, rain and records for December
Eureka in December has a normal high of 55°F and a normal low of 40°F, a daily mean of 47°F, holding near 55°F all month. Measurable precipitation falls on 17 days in a normal December, 8.10 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of 4°C, 206 mm of precipitation in December.
- NOAA stationEureka Weather Office Woodley Island
- Station IDUSW00024213
- Location40.81°N 124.16°W
- Elevation20 ft (6 m)
- From the centerunder 1 mile
- Population25,412
- Jan 55° 41°
- Feb 55° 41°
- Mar 56° 42°
- Apr 57° 44°
- May 60° 48°
- Jun 62° 50°
- Jul 63° 52°
- Aug 64° 53°
- Sep 64° 51°
- Oct 62° 47°
- Nov 58° 43°
- Dec 55° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Eureka in December?
The normal high is 55°F and the normal low 40°F, for a daily mean of 47.4°F. December is 3.1°F cooler than November and 0.5°F cooler than January. December is the 12th warmest month of the year in Eureka and the wettest. Across the month the normal high falls 1°F, from 56°F on December 1 to 55°F on December 31. From one year to the next December's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 45°F and 50°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 55%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 56°F | 41°F | 54% | 36% |
| December 8 | 55°F | 40°F | 55% | 38% |
| December 15 | 55°F | 40°F | 55% | 39% |
| December 22 | 54°F | 40°F | 54% | 39% |
| December 31 | 55°F | 40°F | 54% | 39% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 19)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 56°F | 41°F | 54% | 36% | 9 h 30 min |
| December 2 | 56°F | 41°F | 54% | 37% | 9 h 30 min |
| December 3 | 55°F | 41°F | 54% | 37% | 9 h 30 min |
| December 4 | 55°F | 41°F | 55% | 37% | 9 h 30 min |
| December 5 | 55°F | 41°F | 55% | 38% | 9 h 20 min |
| December 6 | 55°F | 40°F | 55% | 38% | 9 h 20 min |
| December 7 | 55°F | 40°F | 55% | 38% | 9 h 20 min |
| December 8 | 55°F | 40°F | 55% | 38% | 9 h 20 min |
| December 9 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 10 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 11 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 12 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 13 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 14 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 15 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 16 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 17 | 55°F | 40°F | 55% | 39% | 9 h 20 min |
| December 18 | 54°F | 40°F | 55% | 39% | 9 h 20 min |
| December 19 | 54°F | 40°F | 55% | 39% | 9 h 10 min |
| December 20 | 54°F | 40°F | 55% | 39% | 9 h 10 min |
| December 21 | 54°F | 40°F | 54% | 39% | 9 h 10 min |
| December 22 | 54°F | 40°F | 54% | 39% | 9 h 10 min |
| December 23 | 54°F | 40°F | 54% | 39% | 9 h 10 min |
| December 24 | 54°F | 40°F | 54% | 39% | 9 h 10 min |
| December 25 | 54°F | 40°F | 54% | 39% | 9 h 10 min |
| December 26 | 54°F | 40°F | 54% | 39% | 9 h 20 min |
| December 27 | 54°F | 40°F | 54% | 39% | 9 h 20 min |
| December 28 | 55°F | 40°F | 54% | 39% | 9 h 20 min |
| December 29 | 55°F | 40°F | 54% | 39% | 9 h 20 min |
| December 30 | 55°F | 40°F | 54% | 39% | 9 h 20 min |
| December 31 | 55°F | 40°F | 54% | 39% | 9 h 20 min |
- Normal high
- 55°FDecember average
- Normal low
- 40°FDecember average
- Precipitation
- 8.10 inmonth total
- Days with precipitation
- 170.01 inch or more
- Nights at 32°F or colder
- 3
- Daylight
- 9 h 30 min to 9 h 20 minDecember 1 to December 31
- Sunshine
- 63%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024213; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Eureka in December?
On a given December day the chance of 0.01 inch or more is 55% on average, highest around December 11 (55%). In all, 8.10 in falls on 17 days of a normal December, 3 of them with an inch or more.
In a normal December in Eureka, 3 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024213.
What are the records for December in Eureka?
The warmest December temperature on Eureka's official record (since 1886) is 77°F, on December 30, 1963; the coldest is 21°F, on December 9, 1972. The wettest December brought 23.31 in (2002); the snowiest, 1.9 inches (1972).
The December mean against the 1991-2020 normal of 47.4°F: 2021 46.2°F (−1.2), 2022 46.1°F (−1.3), 2023 51.4°F (+4.0), 2024 50.0°F (+2.6), 2025 49.5°F (+2.1). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.2°F | −1.2°F | 7.25 in |
| 2022 | 46.1°F | −1.3°F | 8.54 in |
| 2023 | 51.4°F | +4.0°F | 7.78 in |
| 2024 | 50.0°F | +2.6°F | 9.88 in |
| 2025 | 49.5°F | +2.1°F | 8.68 in |
Source: records: ACIS, NWS threaded record EKAthr; recent months: ACIS, station USW00024213. Records and recent months use complete months only.
How does December in Eureka 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; Eureka's is 55°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.