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.
Overnight
54°F
Patchy Fog
Patchy fog after 5am. Cloudy, with a low around 54. Southwest wind around 0 mph.
7-day forecast for San Luis Obispo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Patchy Fog | 0 mph | 0% |
| Tuesday | 79°F | Patchy Fog then Partly Sunny | 0 to 5 mph SW | 0% |
| Tuesday Night | 55°F | Patchy Fog | 0 to 5 mph SW | 0% |
| Wednesday | 80°F | Patchy Fog then Mostly Sunny | 0 to 5 mph WSW | 0% |
| Wednesday Night | 57°F | Patchy Fog | 0 to 5 mph WNW | 0% |
| Thursday | 81°F | Patchy Fog then Mostly Sunny | 0 to 5 mph WNW | 0% |
| Thursday Night | 58°F | Patchy Fog | 0 to 5 mph NW | 0% |
| Friday | 81°F | Patchy Fog then Mostly Sunny | 0 to 5 mph WSW | 0% |
| Friday Night | 59°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Saturday | 82°F | Sunny | 0 to 5 mph WSW | 0% |
| Saturday Night | 59°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Sunday | 81°F | Sunny | 0 to 5 mph SSW | 0% |
| Sunday Night | 57°F | Partly Cloudy | 0 to 5 mph SSW | 1% |
| Monday | 77°F | Sunny | 0 to 10 mph SW | 1% |
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 Aug 4, 2026.