Historic Vallejo City Hall and county building

Weather · December

Vallejo weather in December

Average highs of 58°F, lows of 42°F and 4.5 in of rain, from 30 years of weather records.

December is Vallejo’s 11th warmest month, with average highs of 58°F and lows of 42°F. That is 8° cooler than November, and 16° below the yearly average high.

Average high
58°F
Average low
42°F
Precipitation
4.5 in
Sunrise · sunset
7:18 AM · 4:50 PM

December across the year

  1. 57°42°Jan
  2. 63°45°Feb
  3. 68°46°Mar
  4. 73°47°Apr
  5. 78°51°May
  6. 83°54°Jun
  7. 85°56°Jul
  8. 86°56°Aug
  9. 86°57°Sep
  10. 79°54°Oct
  11. 66°47°Nov
  12. 58°42°Dec

High and low Rain

What to wear in December

  • Cool days: a warm jacket and long pants, plus layers for the swing between morning and afternoon.
  • Pack an umbrella or rain jacket: rain or snow falls on about several days this month.

December is good for

What’s on in Vallejo in December

See all upcoming events.

Around Vallejo

Marquee of Empress theater in Vallejo
Marquee of Empress theater in VallejoKiddo27 · CC BY-SA 4.0
A building in downtown Vallejo, California
A building in downtown Vallejo, CaliforniaKiddo27 · CC BY-SA 4.0
Napa Valley Transit 334 in Vallejo
Napa Valley Transit 334 in Vallejo 20260802Evan0512 · CC BY-SA 4.0

See Vallejo

A look around town before you go.

December compared with the months around it

MonthHighLowRain
November66°F47°F2.2 in
December58°F42°F4.5 in
January57°F42°F4.5 in

Planning a trip? See the best time to visit Vallejo and today’s forecast.

Questions

How hot does it get in Vallejo in December?

Average highs are 58°F and average lows 42°F, for a daily mean of 50°F. Individual days run hotter or colder than these 30-year averages.

Does it rain in Vallejo in December?

December averages 4.5 in of precipitation. It is the 2nd wettest month of the year.

What time is sunset in Vallejo in December?

Around mid-December the sun rises about 7:18 AM and sets about 4:50 PM, for roughly 9.5 hours of daylight.

Is December a good time to visit Vallejo?

The mildest months for visiting are May, June, October. December is cool, with Christmas lights and New Year’s Eve events.

NOAA U.S. Climate Normals 1991–2020, Vallejo station (2.8 mi from downtown). Sunrise and sunset are calculated for December 15 at the city’s coordinates.

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