San Luis Obispo, CA Weather & Growing Conditions
Today
71°F
Patchy Fog then Partly Sunny
Patchy fog before 11am. Partly sunny, with a high near 71. West wind 0 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Patchy Fog then Partly Sunny | 0 to 10 mph W | 0% |
| Tonight | 55°F | Patchy Fog | 0 to 5 mph WNW | 0% |
| Wednesday | 72°F | Patchy Fog then Partly Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 56°F | Patchy Fog | 5 to 10 mph WNW | 0% |
| Thursday | 73°F | Patchy Fog then Mostly Sunny | 0 to 10 mph WNW | 0% |
| Thursday Night | 56°F | Patchy Fog | 0 to 10 mph NW | 0% |
| Friday | 76°F | Patchy Fog then Mostly Sunny | 0 to 10 mph WSW | 0% |
| Friday Night | 57°F | Partly Cloudy | 0 to 10 mph NW | 0% |
| Saturday | 78°F | Mostly Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 58°F | Partly Cloudy | 0 to 10 mph WNW | 0% |
| Sunday | 77°F | Mostly Sunny | 0 to 10 mph SSW | 0% |
| Sunday Night | 57°F | Partly Cloudy | 0 to 10 mph SW | 0% |
| Monday | 74°F | Mostly Sunny | 0 to 10 mph SSW | 1% |
| Monday Night | 55°F | Partly Cloudy | 0 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Luis Obispo, CA
Last spring frost
Jan 16
First fall frost
Dec 25
Growing season
349 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 Poly, Ca (4.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.