San Luis Obispo, CA Weather & Growing Conditions
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Northwest wind 5 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 5 to 15 mph NW | 0% |
| Tonight | 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% |
| Friday Night | 58°F | Mostly Cloudy | 0 to 10 mph SSW | 2% |
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.