THINGS TO DO · YOUTUBE SHORT
Things to Do in Simi Valley!
A local activity Short shared by Teresa in California.
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Weather · December
Simi Valley weather in December
Average highs of 69°F, lows of 42°F and 2.7 in of rain, from 30 years of weather records.
December is Simi Valley’s coldest month, with average highs of 69°F and lows of 42°F. That is 7° cooler than November, and 13° below the yearly average high.
- Average high
- 69°F
- Average low
- 42°F
- Precipitation
- 2.7 in
- Wet days
- 6
- Sunrise · sunset
- 6:53 AM · 4:46 PM
December across the year
High and low Rain
What to wear in December
- Mild days: dress in layers, with a light jacket or sweater for mornings and evenings.
December is good for
What’s on in Simi Valley in December
- Simi Community ChristmasDecember 4 – December 6 · Evenings, roughly 5:30-8:30 p.m. · The Church of Jesus Christ of Latter-day Saints, Sinaloa Road, Simi Valley
- Winter Art MarketplaceSaturday, December 5 · 10 a.m.-4 p.m. · Simi Valley Cultural Arts Center
- Menorah Lighting Ceremony at the Reagan LibraryThursday, December 10 · 5-6 p.m. · Outdoors at the Ronald Reagan Presidential Library & Museum, Simi Valley
- Raymond Michael as Elvis: Blue Christmas ConcertSunday, December 13 · 7:30 p.m. · Simi Valley Cultural Arts Center
- New Year's Eve Celebration at the Reagan LibraryThursday, December 31 · Evening; after-hours Air Force One and exhibit access 8-10 p.m. · Air Force One Pavilion, Ronald Reagan Presidential Library & Museum, Simi Valley
See all upcoming events.
Around Simi Valley
See Simi Valley
A look around town before you go.
THINGS TO DO · YOUTUBE SHORT
Top Things to do in Simi Valley.
A local activity Short shared by Lian Turnbough.
Watch on YouTube ↗December compared with the months around it
Planning a trip? See the best time to visit Simi Valley and today’s forecast.
Questions
How hot does it get in Simi Valley in December?
Average highs are 69°F and average lows 42°F, for a daily mean of 56°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in Simi Valley in December?
December averages 2.7 in of precipitation over about 6 days with at least 0.01 in. It is the 4th wettest month of the year.
What time is sunset in Simi Valley in December?
Around mid-December the sun rises about 6:53 AM and sets about 4:46 PM, for roughly 9.9 hours of daylight.
Is December a good time to visit Simi Valley?
The mildest months for visiting are April, May, November. December is mild, with Christmas lights and New Year’s Eve events.
NOAA U.S. Climate Normals 1991–2020, Woodland Hills Pierce College station (11.3 mi from downtown). Sunrise and sunset are calculated for December 15 at the city’s coordinates.