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San Luis Obispo, CA Weather & Growing Conditions

Overnight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. North wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 55°F Partly Cloudy 5 mph N 0%
Saturday 83°F Mostly Sunny 5 to 15 mph NW 0%
Saturday Night 56°F Patchy Fog 5 to 10 mph N 0%
Sunday 77°F Patchy Fog then Mostly Cloudy 5 to 10 mph W 0%
Sunday Night 56°F Patchy Fog 5 to 10 mph NW 1%
Monday 72°F Patchy Fog then Mostly Sunny 5 to 15 mph WNW 0%
Monday Night 54°F Patchy Fog 0 to 10 mph NW 0%
Tuesday 76°F Patchy Fog then Mostly Sunny 0 to 10 mph WNW 0%
Tuesday Night 57°F Partly Cloudy 0 to 10 mph NNW 0%
Wednesday 86°F Sunny 0 to 5 mph W 0%
Wednesday Night 60°F Mostly Clear 0 to 5 mph NNE 0%
Thursday 84°F Sunny 0 to 5 mph SSE 0%
Thursday Night 59°F Partly Cloudy 0 to 5 mph NNW 0%
Friday 80°F Mostly Sunny 0 to 10 mph S 0%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for San Luis Obispo, CA

Last spring frost
Jan 31
First fall frost
Dec 11
Growing season
319 days
Hardiness zone
9b

Explore more for San Luis Obispo, CA: full frost dates · planting calendar · California frost dates

Climate data from the nearest NOAA station, San Luis Obispo Ap, Ca (1.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.