Corona, CA weather in December
In December, Corona sees highs around 69°F and lows around 40°F: mild and mostly dry. Rain falls on about 4 days. It is one of the coolest months in Corona. Good for outdoor plans.
- Normal high
- 69°F
- Normal low
- 40°F
- Wet days
- 4
- 1.4 in total
- Daylight
- 9.9 h
How December changes from start to finish
| December 1 | December 31 | |
|---|---|---|
| Normal high | 71°F | 69°F |
| Normal low | 41°F | 41°F |
| Chance of a wet day | 11% | 16% |
| Sunrise / sunset | 6:37 am / 4:41 pm | 6:55 am / 4:51 pm |
| Daylight | 10.1 h | 9.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical December day
- 6 am42°Fdew point 32°F
- 9 am52°Fdew point 34°F
- Noon63°Fdew point 30°F
- 3 pm64°Fdew point 30°F
- 6 pm54°Fdew point 33°F
- 9 pm49°Fdew point 33°F
NOAA hourly normals (local standard time) from March AFB (18 mi away); average wind 5 mph; clear or few clouds in 61% of daytime hours, mostly cloudy or overcast in 31%.
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)17 of 31
- Hot dayshigh 90°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow4 of 31
- Notable rainat least 0.10 in3 of 31
- Freezing nightslow 32°F or below5 of 31
Average days per December, counted from daily records for each year 1991-2020.
Rain in December
Normal precipitation is 1.4 in; a dry December brings about 0.5 in and a wet one about 1.8 in (25th and 75th percentiles). About 1 day brings half an inch or more. Snow is very rare.
How December varies from year to year
- Warmest December, 1991-20202017: average high 77°F
- Coolest December2012: average high 64°F
- Wettest December1992: 3.3 in
- Driest December2000: no measurable precipitation
- Highest reading88°F (December 29, 2017)
- Lowest reading23°F (December 24, 1998)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
December compared with November and January
| November | December | January | |
|---|---|---|---|
| Normal high | 76°F | 69°F | 70°F |
| Normal low | 45°F | 40°F | 42°F |
| Wet days | 2 | 4 | 5 |
| Comfortable days | 17 | 17 | 17 |
| Daylight | 10.4 h | 9.9 h | 10.2 h |
Highs change by -7°F from November and +1°F into January.
Nearby alternatives in December
- Cooler: Big Bear Lake, CA45 mi · high 46°F · 5 wet days
How Corona ranks in December
- Normal high33rd warmest of 378 cities; 3rd of 60 in California
- Wet days21st driest of 378
What to pack for Corona in December
- A warm jacket – lows near 40°F, highs near 69°F
- Layers – afternoons near 69°F but nights near 40°F
Frost in December
The first fall frost typically comes around Dec 19; in 1 year in 10 it comes before Nov 27. All frost dates for Corona.
Heating and cooling
December has 325 heating degree days and 1 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How cold is Corona in December?
The normal high is 69°F and the normal low is 40°F. From 1991 to 2020 the coldest December reading was 23°F (December 24, 1998).
Does it rain a lot in Corona in December?
About 4 days in December have at least 0.01 in of precipitation, and the normal total is 1.4 in. The wettest December in 1991-2020 was in 1992 (3.3 in); the driest was in 2000, with no measurable precipitation.
Does it snow in Corona in December?
Snow is very rare: the 1991-2020 normal for December rounds to 0.0 in.
Is December a good time to visit Corona?
December ranks 6th of 12 months on our comfort score for Corona (67 out of 100). It has about 17 comfortable days (judged by temperature only). The best months are March, April and May.
Where the numbers come from
- Temperature and frost dates: Chino Airport (USW00003179), 8.0 mi NNW of the city center, 650 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Riverside Fire Stn 3 (USC00047470), 12 mi ENE of the city center, 840 ft (162 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: March AFB (USW00023119), 18 mi E of the city center, 1,516 ft (838 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Not available for this location: daily humidity and wind (no station close enough or similar enough in elevation).