Shasta weather in December: Shasta, California: normal highs, lows, rain and records for December
Shasta in December has a normal high of 54°F and a normal low of 41°F, a daily mean of 47°F, falling from 56°F on the 1st to 54°F by the 31st. Measurable precipitation falls on 14 days in a normal December, 11.99 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 12°C and low of 5°C, 305 mm of precipitation in December.
- NOAA stationShasta Dam
- Station IDUSC00048135
- Location40.71°N 122.42°W
- Elevation1,075 ft (328 m)
- From the center9 miles
- Population (census place)1,330
- Jan 55° 41°
- Feb 59° 42°
- Mar 63° 44°
- Apr 70° 48°
- May 79° 55°
- Jun 88° 63°
- Jul 97° 69°
- Aug 96° 68°
- Sep 90° 63°
- Oct 78° 55°
- Nov 62° 46°
- Dec 54° 41°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Shasta in December?
The normal high is 54°F and the normal low 41°F, for a daily mean of 47.4°F. December is 6.8°F cooler than November and 0.4°F cooler than January. December is the 12th warmest month of the year in Shasta and the wettest. Across the month the normal high falls 2°F, from 56°F on December 1 to 54°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 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 43%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 56°F | 42°F | 42% | 31% |
| December 8 | 55°F | 41°F | 43% | 32% |
| December 15 | 54°F | 40°F | 43% | 33% |
| December 22 | 54°F | 40°F | 43% | 32% |
| December 31 | 54°F | 40°F | 43% | 32% |
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 | 56°F | 42°F | 42% | 31% | 9 h 30 min |
| December 2 | 56°F | 42°F | 42% | 31% | 9 h 30 min |
| December 3 | 56°F | 42°F | 42% | 31% | 9 h 30 min |
| December 4 | 56°F | 42°F | 42% | 31% | 9 h 30 min |
| December 5 | 55°F | 42°F | 43% | 32% | 9 h 20 min |
| December 6 | 55°F | 41°F | 43% | 32% | 9 h 20 min |
| December 7 | 55°F | 41°F | 43% | 32% | 9 h 20 min |
| December 8 | 55°F | 41°F | 43% | 32% | 9 h 20 min |
| December 9 | 55°F | 41°F | 43% | 32% | 9 h 20 min |
| December 10 | 54°F | 41°F | 43% | 32% | 9 h 20 min |
| December 11 | 54°F | 41°F | 43% | 33% | 9 h 20 min |
| December 12 | 54°F | 41°F | 43% | 33% | 9 h 20 min |
| December 13 | 54°F | 41°F | 43% | 33% | 9 h 20 min |
| December 14 | 54°F | 40°F | 43% | 33% | 9 h 20 min |
| December 15 | 54°F | 40°F | 43% | 33% | 9 h 20 min |
| December 16 | 54°F | 40°F | 43% | 33% | 9 h 20 min |
| December 17 | 54°F | 40°F | 43% | 33% | 9 h 20 min |
| December 18 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 19 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 20 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 21 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 22 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 23 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 24 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 25 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 26 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 27 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 28 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 29 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 30 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
| December 31 | 54°F | 40°F | 43% | 32% | 9 h 20 min |
- Normal high
- 54°FDecember average
- Normal low
- 41°FDecember average
- Precipitation
- 11.99 inmonth total
- Days with precipitation
- 140.01 inch or more
- Nights at 32°F or colder
- 2
- Daylight
- 9 h 30 min to 9 h 20 minDecember 1 to December 31
- Sunshine
- 66%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00048135; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Shasta in December?
On a given December day the chance of 0.01 inch or more is 43% on average, highest around December 12 (43%). In all, 11.99 in falls on 14 days of a normal December, 4 of them with an inch or more.
In a normal December in Shasta, 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00048135.
What are the records for December in Shasta?
The warmest December temperature on this station's record (since 1943) is 80°F, on December 3, 2021; the coldest is 14°F, on December 22, 1990. The wettest December brought 37.83 in (2002); the snowiest, 18.0 inches (1968).
The December mean against the 1991-2020 normal of 47.4°F: 2021 45.4°F (−2.0), 2022 44.8°F (−2.6), 2023 50.4°F (+3.0), 2025 47.3°F (−0.1). 1 of 4 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 45.4°F | −2.0°F | 13.56 in |
| 2022 | 44.8°F | −2.6°F | 12.56 in |
| 2023 | 50.4°F | +3.0°F | 11.31 in |
| 2025 | 47.3°F | −0.1°F | 15.75 in |
Source: records: ACIS, station USC00048135; recent months: ACIS, station USC00048135. Records and recent months use complete months only.
How does December in Shasta 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; Shasta's is 54°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.