San Luis Obispo, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Luis Obispo, a city in San Luis Obispo County, California.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. West northwest wind 5 to 15 mph.
7-day forecast for San Luis Obispo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 15 mph WNW | 0% |
| Tonight | 57°F | Patchy Fog | 5 mph N | 0% |
| Sunday | 78°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph WNW | 0% |
| Sunday Night | 56°F | Patchy Fog | 5 to 10 mph WNW | 1% |
| Monday | 70°F | Patchy Fog then Mostly Sunny | 5 to 10 mph WNW | 1% |
| Monday Night | 55°F | Patchy Fog | 0 to 10 mph NW | 1% |
| Tuesday | 75°F | Patchy Fog then Mostly Sunny | 0 to 10 mph WNW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 5 to 10 mph NNW | 0% |
| Wednesday | 85°F | Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Thursday | 83°F | Sunny | 0 to 5 mph SSW | 0% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Friday | 79°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Friday Night | 58°F | Partly Cloudy | 5 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for San Luis Obispo (35.266, -120.668). Updated through the day.
Growing snapshot for San Luis Obispo
Last spring frost
Jan 16
First fall frost
Dec 25
Growing season
349 days
Hardiness zone
9b
More local growing data for San Luis Obispo: nearby ZIP 93410 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, San Luis Obispo Poly, Ca (0.3 mi from San Luis Obispo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.