Daylight through the yearLongest day (Jun 21): 14 h 33 min5:48 am – 8:21 pmShortest day (Dec 21): 9 h 47 min7:07 am – 4:54 pm
Sun todaySunrise –Sunset –
ClimateWarmest month September: highs 80°F, lows 54°FColdest month December: highs 64°F, lows 44°F22 in of rain a year, on about 33 dayswettest month JanuarySnow is rare19 days above 90°F, 3 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, San Luis Obispo Poly station, 4 mi away
Earthquakes807 of magnitude 3 or more within 50 miles since 197061 of magnitude 4+, 4 of magnitude 5+Largest: magnitude 6.5 on 22 Dec 200335 mi away, near San Simeon, CaliforniaMost recent: magnitude 3.5 on 12 Dec 202518 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively HighSan Luis Obispo County, CA, compared with all US countiesHigher-risk hazardsDrought Very HighLandslide Relatively HighWildfire Relatively HighRiver flooding Relatively HighSource: FEMA National Risk Index (county level)
Air quality52% of days had good air in 2025191 of 365 days measured167 moderate, 7 unhealthy for sensitive groups daysMedian index 50, worst day 119main pollutant: ozoneSource: US EPA Air Quality Index, San Luis Obispo County monitors, CA
Drinking waterSan Luis Obispo Water Departmentserves 47,788 people from surface waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation437 ft133 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalCalifornia Mens Colony Hospital2.8 miPost officeSan Luis Obispo Post Office4.1 miTown hallSan Luis Obispo City Hall4.2 miPoliceSan Luis Obispo County Sheriff's Office1.5 miFire stationCalifornia Men's Colony Fire Department2.7 miSource: USGS National Structures Dataset
Getting aroundAirportSan Luis County Regional Airport SBP6.8 miMajor airportFresno Yosemite International Airport FAT117 miUS highwayUS 1013.9 miAmtrakAmtrak Station SLO4.8 miCoachSan Luis Obispo Amtrak Bus StopAmtrak Chartered Vehicle4.5 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 93406 ZIP area.
