San Luis Obispo, CA Weather & Growing Conditions
Tonight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. Northwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Partly Cloudy | 5 to 10 mph NW | 1% |
| Saturday | 79°F | Mostly Sunny then Patchy Fog | 5 to 15 mph NW | 1% |
| Saturday Night | 56°F | Patchy Fog | 5 to 10 mph NNW | 0% |
| Sunday | 75°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph NW | 2% |
| Sunday Night | 55°F | Patchy Fog | 5 to 10 mph NW | 2% |
| Monday | 71°F | Patchy Fog then Mostly Sunny | 5 to 15 mph WNW | 1% |
| Monday Night | 54°F | Mostly Cloudy | 5 to 15 mph NW | 1% |
| Tuesday | 73°F | Mostly Sunny | 5 to 10 mph NW | 0% |
| Tuesday Night | 57°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Wednesday | 84°F | Sunny | 5 to 10 mph NNW | 0% |
| Wednesday Night | 60°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Thursday | 83°F | Mostly Sunny | 0 to 10 mph SSE | 0% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 10 mph N | 1% |
| Friday | 80°F | Mostly Sunny | 0 to 10 mph SSW | 0% |
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 Sep 19, 2026.