Lancaster weather in December: Lancaster, California: normal highs, lows, rain and records for December
Lancaster in December has a normal high of 58°F and a normal low of 30°F, a daily mean of 44°F, falling from 60°F on the 1st to 57°F by the 31st. Measurable precipitation falls on 4 days in a normal December, 1.11 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of −1°C, 28 mm of precipitation in December.
- NOAA stationLancaster
- Station IDUSW00003159
- Location34.74°N 118.21°W
- Elevation2,338 ft (713 m)
- Population167,426
- Jan 59° 31°
- Feb 62° 35°
- Mar 67° 40°
- Apr 73° 45°
- May 82° 53°
- Jun 91° 62°
- Jul 98° 67°
- Aug 98° 65°
- Sep 91° 57°
- Oct 80° 46°
- Nov 67° 35°
- Dec 58° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lancaster in December?
The normal high is 58°F and the normal low 30°F, for a daily mean of 43.7°F. December is 7.3°F cooler than November and 1.3°F cooler than January. December is the 12th warmest month of the year in Lancaster and the 3rd wettest. Across the month the normal high falls 3°F, from 60°F on December 1 to 57°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 42°F and 46°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 16%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 60°F | 31°F | 11% | 6% |
| December 8 | 58°F | 30°F | 13% | 6% |
| December 15 | 57°F | 29°F | 14% | 8% |
| December 22 | 57°F | 30°F | 15% | 9% |
| December 31 | 57°F | 30°F | 16% | 10% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 13)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 60°F | 31°F | 11% | 6% | 10 h |
| December 2 | 60°F | 30°F | 11% | 6% | 10 h |
| December 3 | 60°F | 30°F | 12% | 6% | 10 h |
| December 4 | 59°F | 30°F | 12% | 6% | 10 h |
| December 5 | 59°F | 30°F | 12% | 6% | 10 h |
| December 6 | 59°F | 30°F | 12% | 6% | 10 h |
| December 7 | 59°F | 30°F | 12% | 6% | 10 h |
| December 8 | 58°F | 30°F | 13% | 6% | 9 h 50 min |
| December 9 | 58°F | 30°F | 13% | 7% | 9 h 50 min |
| December 10 | 58°F | 30°F | 13% | 7% | 9 h 50 min |
| December 11 | 58°F | 29°F | 13% | 7% | 9 h 50 min |
| December 12 | 58°F | 29°F | 13% | 7% | 9 h 50 min |
| December 13 | 57°F | 29°F | 14% | 7% | 9 h 50 min |
| December 14 | 57°F | 29°F | 14% | 7% | 9 h 50 min |
| December 15 | 57°F | 29°F | 14% | 8% | 9 h 50 min |
| December 16 | 57°F | 29°F | 14% | 8% | 9 h 50 min |
| December 17 | 57°F | 29°F | 14% | 8% | 9 h 50 min |
| December 18 | 57°F | 29°F | 15% | 8% | 9 h 50 min |
| December 19 | 57°F | 29°F | 15% | 8% | 9 h 50 min |
| December 20 | 57°F | 29°F | 15% | 9% | 9 h 50 min |
| December 21 | 57°F | 29°F | 15% | 9% | 9 h 50 min |
| December 22 | 57°F | 30°F | 15% | 9% | 9 h 50 min |
| December 23 | 57°F | 30°F | 15% | 9% | 9 h 50 min |
| December 24 | 57°F | 30°F | 16% | 9% | 9 h 50 min |
| December 25 | 57°F | 30°F | 16% | 9% | 9 h 50 min |
| December 26 | 57°F | 30°F | 16% | 9% | 9 h 50 min |
| December 27 | 57°F | 30°F | 16% | 10% | 9 h 50 min |
| December 28 | 57°F | 30°F | 16% | 10% | 9 h 50 min |
| December 29 | 57°F | 30°F | 16% | 10% | 9 h 50 min |
| December 30 | 57°F | 30°F | 16% | 10% | 9 h 50 min |
| December 31 | 57°F | 30°F | 16% | 10% | 9 h 50 min |
- Normal high
- 58°FDecember average
- Normal low
- 30°FDecember average
- Precipitation
- 1.11 inmonth total
- Days with precipitation
- 40.01 inch or more
- Nights at 32°F or colder
- 20
- Daylight
- 10 h to 9 h 50 minDecember 1 to December 31
- Days at 70°F or more
- 2
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003159; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lancaster in December?
On a given December day the chance of 0.01 inch or more is 14% on average, highest around December 31 (16%). In all, 1.11 in falls on 4 days of a normal December.
In a normal December in Lancaster, 20 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003159.
How humid and windy is Lancaster in December?
At 3 p.m. the normal temperature is 55°F with 30% relative humidity and a dew point of 24°F; at 6 a.m. it is 32°F with 66% humidity. The wind averages 6.8 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 32°F | 22°F | 66% | 4.9 mph | 79% |
| 9 a.m. | 39°F | 26°F | 57% | 4.6 mph | 76% |
| noon | 52°F | 25°F | 35% | 8.4 mph | 72% |
| 3 p.m. | 55°F | 24°F | 30% | 9.6 mph | 71% |
| 6 p.m. | 46°F | 25°F | 44% | 8.1 mph | 76% |
| 9 p.m. | 40°F | 25°F | 54% | 7.0 mph | 80% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00003159. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in Lancaster?
The warmest December temperature on Lancaster's official record (since 1945) is 85°F, on December 4, 1958; the coldest is 2°F, on December 24, 1984. The wettest December brought 5.35 in (1984); the snowiest, 17.3 inches (1984).
The December mean against the 1991-2020 normal of 43.7°F: 2021 44.9°F (+1.2), 2022 45.6°F (+1.9), 2023 47.9°F (+4.2), 2024 48.9°F (+5.2), 2025 50.1°F (+6.4). 5 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 44.9°F | +1.2°F | 2.61 in |
| 2022 | 45.6°F | +1.9°F | 1.13 in |
| 2023 | 47.9°F | +4.2°F | 1.02 in |
| 2024 | 48.9°F | +5.2°F | 0.00 in |
| 2025 | 50.1°F | +6.4°F | 2.68 in |
Source: records: ACIS, NWS threaded record WJFthr; recent months: ACIS, station USW00003159. Records and recent months use complete months only.
How does December in Lancaster 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; Lancaster's is 58°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Lancaster in November67°F by day, 35°F at night
- Lancaster in January59°F by day, 31°F at night
- Lancaster 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