Cool
Average highs are around 14°C, so pack for cooler days.
December verdict
San Francisco, California, United States in December
Weather score28Poor
Poor for holiday weather
Average highs are around 14°C, so pack for cooler days. Sunshine averages 4.9h per day, so this is not one of the brighter months. Rainfall averages 60mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
14°C
Rain
60mm
Sun
4.9h
Sea
13°C
Weather score
28
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 60mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.9h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare San Francisco, California, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December14°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to October
This stretch sets the upper range for average daytime heat.
Rain
December60mm average rain
December is wetter than San Francisco's yearly average, so flexible plans matter more.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December4.9 hours average sun
December is one of San Francisco's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December13°C average sea
December is below San Francisco's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to October
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
December28 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsMay to September
These months have the strongest weather score in the monthly averages.
Hotels in San Francisco, California, United States
Marriott
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The Ritz-Carlton, San FranciscoSan Francisco, California, USA
The St. Regis San FranciscoSan Francisco, California, USA
JW Marriott San Francisco Union SquareSan Francisco, California, USA
Palace Hotel, a Luxury Collection Hotel, San FranciscoSan Francisco, California, USA
W San FranciscoSan Francisco, California, USA
San Francisco Marriott Fisherman's WharfSan Francisco, California, USA