San Luis Obispo County weather, town by town
29 places in San Luis Obispo County, California, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
San Luis Obispo County Weather Facts
San Luis Obispo County has 29 places on myweatherrock (22 census-designated places, 7 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 117°F at San Luis Obispo Mcchesney Fld on September 6, 2020. The coldest night is 0°F at Paso Robles on January 6, 1913. The wettest day brought 8.83 inches of rain at Santa Margarita Boost on October 14, 2009. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Atascadero, about 26 square miles.
About San Luis Obispo County weather
The map on the Now tab shows every San Luis Obispo County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 29 San Luis Obispo County towns with station normals, the warmest month is September, when the day usually reaches 82°F, and the coldest is December, when the night usually falls to 40°F. February is the wettest, with rain on about 9 days. September afternoons run from about 75°F in Blacklake to 91°F in Shandon. December nights run from about 32°F in Atascadero to 46°F in Cambria.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
San Luis Obispo County weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about San Luis Obispo County weather
- What is the hottest temperature recorded at a San Luis Obispo County station?
- 117°F at San Luis Obispo Mcchesney Fld on September 6, 2020, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a San Luis Obispo County station?
- 0°F at Paso Robles on January 6, 1913.
- What is the most rain a San Luis Obispo County station has measured in one day?
- 8.83 inches at Santa Margarita Boost on October 14, 2009.
- How many San Luis Obispo County towns have a weather page here?
- 29: 22 census-designated places, 7 cities. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the San Luis Obispo County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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