Cool
Average highs are around 17°C, so pack for cooler days.
December verdict
San Luis Obispo, California, United States in December
Weather score28Poor
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 5h per day, enough for a balanced month. Rainfall averages 89mm, so some wet days are possible.
December weather
Monthly averages
Temp
17°C
Rain
89mm
Sun
5h
Sea
14°C
Weather score
28
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 89mm, so some wet days are possible.
Some sun
Sunshine averages 5h per day, enough for a balanced month.
Cool sea
Sea temperatures average 14°C, so the water can feel cool.
Map
Weather map
Compare San Luis Obispo, California, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December17°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJuly to October
This stretch sets the upper range for average daytime heat.
Rain
December89mm average rain
December is wetter than San Luis Obispo'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
December5 hours average sun
December is one of San Luis Obispo'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
December14°C average sea
December is close to San Luis Obispo's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to November
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 monthsJune to September
These months have the strongest weather score in the monthly averages.
Hotels in San Luis Obispo, California, United States
Marriott
HOTEL CERRO, Autograph CollectionSan Luis Obispo, California, USA
Courtyard San Luis ObispoSan Luis Obispo, California, USA
SpringHill Suites by Marriott San Luis ObispoSan Luis Obispo, California, USA
Residence Inn By Marriott San Luis ObispoSan Luis Obispo, California, USA
TownePlace Suites by Marriott San Luis ObispoSan Luis Obispo, California, USA