West Covina, CA weather in December
In December, West Covina sees highs around 67°F and lows around 48°F: mild and mostly dry. Rain falls on about 6 days. It is one of the coolest months in West Covina. Good for outdoor plans.
- Normal high
- 67°F
- Normal low
- 48°F
- Wet days
- 6
- 3.3 in total
- Muggy days
- 0
- dew point 65°F+
How December changes from start to finish
| December 1 | December 31 | |
|---|---|---|
| Normal high | 69°F | 67°F |
| Normal low | 49°F | 48°F |
| Chance of a wet day | 17% | 21% |
| Sunrise / sunset | 6:39 am / 4:42 pm | 6:57 am / 4:52 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 am51°Fdew point 39°F
- 9 am57°Fdew point 39°F
- Noon64°Fdew point 39°F
- 3 pm63°Fdew point 43°F
- 6 pm59°Fdew point 45°F
- 9 pm57°Fdew point 44°F
NOAA hourly normals (local standard time) from Los Angeles Intl Airport (27 mi away); average wind 6 mph; clear or few clouds in 77% of daytime hours, mostly cloudy or overcast in 20%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F19 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow6 of 31
- Notable rainat least 0.10 in4 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per December, counted from daily records for each year 1991-2020.
Rain in December
Normal precipitation is 3.3 in; a dry December brings about 0.9 in and a wet one about 5.1 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How December varies from year to year
- Warmest December, 1991-20202017: average high 74°F
- Coolest December2012: average high 64°F
- Wettest December2010: 16.2 in
- Driest December1999: no measurable precipitation
- Highest reading88°F (December 16, 1998)
- Lowest reading36°F (December 27, 2015)
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 | 73°F | 67°F | 68°F |
| Normal low | 53°F | 48°F | 49°F |
| Wet days | 4 | 6 | 7 |
| Comfortable days | 21 | 19 | 18 |
| Daylight | 10.4 h | 9.9 h | 10.2 h |
Highs change by -6°F from November and +1°F into January.
Nearby alternatives in December
- Drier: Palm Springs, CA82 mi · high 69°F · 2 wet days
- Cooler: Palmdale, CA37 mi · high 58°F · 4 wet days
How West Covina ranks in December
- Normal high46th warmest of 378 cities; 12th of 60 in California
- Wet days76th driest of 378
- Comfortable days9th most of 340
Heating and cooling
December has 227 heating degree days and 4 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How cold is West Covina in December?
The normal high is 67°F and the normal low is 48°F. From 1991 to 2020 the coldest December reading was 36°F (December 27, 2015).
Does it rain a lot in West Covina in December?
About 6 days in December have at least 0.01 in of precipitation, and the normal total is 3.3 in. The wettest December in 1991-2020 was in 2010 (16.2 in); the driest was in 1999, with no measurable precipitation.
Is December a good time to visit West Covina?
December ranks 6th of 12 months on our comfort score for West Covina (69 out of 100). It has about 19 comfortable days. The best month is May.
Where the numbers come from
- Temperature: Los Angeles Downtown Usc Campus (USW00093134), 17 mi W of the city center, 230 ft (155 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain: San Gabriel Canyon PH (USC00047776), 6.2 mi NNE of the city center, 744 ft (359 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Covina City Yard Fc387b (USC00042090), 3.7 mi ENE of the city center, 607 ft (222 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: San Gabriel Fire Dept (USC00047785), 9.3 mi W of the city center, 363 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Los Angeles Intl Airport (USW00023174), 27 mi WSW of the city center, 97 ft (288 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Cloud cover: Burbank Glendale Pasadena Airport (USW00023152), 26 mi WNW of the city center, 741 ft (356 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Long Beach / Daugherty Field / Airport (722970-23129), 21 mi SW of the city center, 33 ft (352 ft lower than the city). Hourly observations, 1991-2020.