Mild
Average highs are around 25°C, so days are mild rather than hot.
September verdict
San Luis Obispo, California, United States in September
Weather score65Good
Good for holiday weather
Average highs are around 25°C, so days are mild rather than hot. Sunshine averages 9.1h per day, so bright days are a strong part of the month. Rainfall averages 10mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
25°C
Rain
10mm
Sun
9.1h
Sea
15°C
Weather score
65
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 10mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.1h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 15°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
September25°C average high
September is one of San Luis Obispo's warmest months, with daytime heat above the yearly average.
Warmest monthsJuly to October
This stretch sets the upper range for average daytime heat.
Rain
September10mm average rain
September is one of San Luis Obispo's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September9.1 hours average sun
September is brighter than San Luis Obispo's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September15°C average sea
September is one of San Luis Obispo's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to November
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
September65 weather score
September is one of San Luis Obispo's best weather-score months, combining the strongest overall balance in the yearly averages.
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