Pomona weather in December: Pomona, California: normal highs, lows, rain and records for December
Pomona in December has a normal high of 67°F and a normal low of 42°F, a daily mean of 54°F, falling from 69°F on the 1st to 67°F by the 31st. Measurable precipitation falls on 5 days in a normal December, 2.29 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 5°C, 58 mm of precipitation in December.
- NOAA stationPomona/Fairplex
- Station IDUSC00047050
- Location34.08°N 117.77°W
- Elevation999 ft (305 m)
- From the center2 miles
- Population147,966
- Jan 68° 43°
- Feb 67° 45°
- Mar 72° 47°
- Apr 76° 50°
- May 78° 54°
- Jun 84° 57°
- Jul 90° 62°
- Aug 92° 63°
- Sep 89° 60°
- Oct 81° 54°
- Nov 74° 47°
- Dec 67° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pomona in December?
The normal high is 67°F and the normal low 42°F, for a daily mean of 54.2°F. December is 6.0°F cooler than November and 1.3°F cooler than January. December is the 12th warmest month of the year in Pomona and the 3rd wettest. Across the month the normal high falls 2°F, from 69°F on December 1 to 67°F on December 31. From one year to the next December's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 52°F and 56°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 18%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 69°F | 43°F | 13% | 8% |
| December 8 | 67°F | 42°F | 15% | 10% |
| December 15 | 66°F | 41°F | 17% | 12% |
| December 22 | 66°F | 41°F | 17% | 13% |
| December 31 | 67°F | 42°F | 18% | 15% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 15)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 69°F | 43°F | 13% | 8% | 10 h |
| December 2 | 69°F | 43°F | 14% | 8% | 10 h |
| December 3 | 68°F | 43°F | 14% | 8% | 10 h |
| December 4 | 68°F | 42°F | 14% | 9% | 10 h |
| December 5 | 68°F | 42°F | 14% | 9% | 10 h |
| December 6 | 68°F | 42°F | 15% | 9% | 10 h |
| December 7 | 67°F | 42°F | 15% | 9% | 10 h |
| December 8 | 67°F | 42°F | 15% | 10% | 10 h |
| December 9 | 67°F | 42°F | 15% | 10% | 10 h |
| December 10 | 67°F | 41°F | 16% | 10% | 10 h |
| December 11 | 67°F | 41°F | 16% | 11% | 10 h |
| December 12 | 67°F | 41°F | 16% | 11% | 10 h |
| December 13 | 67°F | 41°F | 16% | 11% | 9 h 50 min |
| December 14 | 66°F | 41°F | 17% | 12% | 9 h 50 min |
| December 15 | 66°F | 41°F | 17% | 12% | 9 h 50 min |
| December 16 | 66°F | 41°F | 17% | 12% | 9 h 50 min |
| December 17 | 66°F | 41°F | 17% | 12% | 9 h 50 min |
| December 18 | 66°F | 41°F | 17% | 13% | 9 h 50 min |
| December 19 | 66°F | 41°F | 17% | 13% | 9 h 50 min |
| December 20 | 66°F | 41°F | 17% | 13% | 9 h 50 min |
| December 21 | 66°F | 41°F | 17% | 13% | 9 h 50 min |
| December 22 | 66°F | 41°F | 17% | 13% | 9 h 50 min |
| December 23 | 66°F | 41°F | 17% | 13% | 9 h 50 min |
| December 24 | 66°F | 41°F | 17% | 14% | 9 h 50 min |
| December 25 | 67°F | 41°F | 17% | 14% | 9 h 50 min |
| December 26 | 67°F | 41°F | 17% | 14% | 9 h 50 min |
| December 27 | 67°F | 41°F | 17% | 14% | 9 h 50 min |
| December 28 | 67°F | 42°F | 18% | 14% | 9 h 50 min |
| December 29 | 67°F | 42°F | 18% | 14% | 9 h 50 min |
| December 30 | 67°F | 42°F | 18% | 15% | 9 h 50 min |
| December 31 | 67°F | 42°F | 18% | 15% | 9 h 50 min |
- Normal high
- 67°FDecember average
- Normal low
- 42°FDecember average
- Precipitation
- 2.29 inmonth total
- Days with precipitation
- 50.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 10 h to 9 h 50 minDecember 1 to December 31
- Days at 70°F or more
- 11
- Days at 80°F or more
- 1
- Sunshine
- 85%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00047050; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pomona in December?
On a given December day the chance of 0.01 inch or more is 16% on average, highest around December 31 (18%). In all, 2.29 in falls on 5 days of a normal December, 1 of them with an inch or more.
In a normal December in Pomona, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00047050.
What are the records for December in Pomona?
The warmest December temperature on this station's record (since 1893) is 93°F, on December 4, 1979; the coldest is 22°F, on December 22, 1990. The wettest December brought 10.27 in (2004); the snowiest, 1.0 inches (1915).
Source: records: ACIS, station USC00047050. Records and recent months use complete months only.
How does December in Pomona 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; Pomona's is 67°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.