San Luis Obispo, CA Weather & Growing Conditions
Overnight
54°F
Mostly Cloudy
Mostly cloudy, with a low around 54. Southwest wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Cloudy | 0 mph | 0% |
| Tuesday | 74°F | Mostly Sunny | 0 to 10 mph WSW | 0% |
| Tuesday Night | 55°F | Mostly Cloudy | 0 to 5 mph WSW | 0% |
| Wednesday | 75°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 0 to 10 mph NW | 0% |
| Thursday | 77°F | Mostly Sunny | 0 to 10 mph WNW | 0% |
| Thursday Night | 58°F | Partly Cloudy | 0 to 10 mph NW | 0% |
| Friday | 79°F | Sunny | 0 to 10 mph WSW | 0% |
| Friday Night | 60°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Saturday | 80°F | Sunny | 0 to 10 mph WSW | 0% |
| Saturday Night | 60°F | Mostly Clear | 0 to 10 mph S | 0% |
| Sunday | 79°F | Sunny | 0 to 10 mph SW | 0% |
| Sunday Night | 58°F | Partly Cloudy | 5 to 10 mph SW | 1% |
| Monday | 74°F | Sunny | 5 to 10 mph SW | 1% |
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 (2.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.