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California Polytechnic State University, CA Weather & Growing Conditions

Tonight
57°F
Partly Cloudy
Partly cloudy, with a low around 57. North northwest wind 5 to 10 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 57°F Partly Cloudy 5 to 10 mph NNW 0%
Saturday 84°F Mostly Sunny then Patchy Fog 5 to 10 mph NW 0%
Saturday Night 58°F Patchy Fog 5 mph N 0%
Sunday 80°F Patchy Fog then Mostly Cloudy 5 to 10 mph W 2%
Sunday Night 56°F Patchy Fog 5 mph W 2%
Monday 75°F Patchy Fog then Partly Sunny 5 to 10 mph W 1%
Monday Night 55°F Partly Cloudy 5 to 10 mph NW 1%
Tuesday 77°F Sunny 5 to 10 mph NNW 0%
Tuesday Night 59°F Mostly Clear 0 to 10 mph NNW 0%
Wednesday 88°F Sunny 0 to 5 mph NW 0%
Wednesday Night 63°F Mostly Clear 0 to 5 mph NNW 0%
Thursday 86°F Sunny 0 to 5 mph SSE 1%
Thursday Night 62°F Partly Cloudy 0 to 5 mph SE 1%
Friday 82°F Mostly Sunny 0 to 5 mph SSW 0%

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

Growing snapshot for California Polytechnic State University, CA

Last spring frost
Jan 16
First fall frost
Dec 25
Growing season
349 days
Hardiness zone
9b

Explore more for California Polytechnic State University, CA: full frost dates · planting calendar · California frost dates

Climate data from the nearest NOAA station, San Luis Obispo Poly, Ca (0.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.