San Luis Obispo, CA Weather & Growing Conditions
Tonight
57°F
Mostly Cloudy
Mostly cloudy, with a low around 57. North northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Mostly Cloudy | 5 mph NNW | 1% |
| Saturday | 80°F | Mostly Sunny then Patchy Fog | 5 to 15 mph NW | 1% |
| Saturday Night | 58°F | Patchy Fog | 5 mph NNW | 0% |
| Sunday | 76°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph WNW | 2% |
| Sunday Night | 57°F | Patchy Fog | 5 to 10 mph WNW | 2% |
| Monday | 71°F | Patchy Fog then Mostly Sunny | 5 to 10 mph WNW | 1% |
| Monday Night | 54°F | Mostly Cloudy | 5 to 10 mph NW | 1% |
| Tuesday | 74°F | Sunny | 5 to 10 mph NW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 5 to 10 mph NNW | 0% |
| Wednesday | 85°F | Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 5 mph N | 0% |
| Thursday | 83°F | Sunny | 0 to 5 mph SSE | 0% |
| Thursday Night | 60°F | Partly Cloudy | 0 to 5 mph ENE | 1% |
| Friday | 80°F | Mostly Sunny | 0 to 10 mph SW | 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
10a
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 (3.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.