San Luis Obispo, CA Weather & Growing Conditions
Today
69°F
Mostly Sunny
Mostly sunny, with a high near 69. North wind 5 to 15 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Mostly Sunny | 5 to 15 mph N | 0% |
| Tonight | 55°F | Mostly Cloudy | 15 to 20 mph N | 0% |
| Thursday | 73°F | Mostly Sunny | 15 to 20 mph NNE | 0% |
| Thursday Night | 54°F | Mostly Clear | 10 to 20 mph NNE | 0% |
| Friday | 77°F | Sunny | 10 to 20 mph NNE | 0% |
| Friday Night | 54°F | Mostly Clear | 10 to 15 mph NE | 0% |
| Saturday | 79°F | Sunny | 0 to 10 mph WNW | 0% |
| Saturday Night | 56°F | Mostly Clear | 0 to 10 mph NNE | 0% |
| Sunday | 79°F | Sunny | 5 to 10 mph N | 0% |
| Sunday Night | 58°F | Mostly Clear | 5 to 10 mph NNE | 0% |
| Monday | 78°F | Mostly Sunny | 0 to 10 mph NNW | 0% |
| Monday Night | 57°F | Partly Cloudy | 5 to 10 mph N | 1% |
| Tuesday | 76°F | Sunny | 5 to 10 mph N | 2% |
| Tuesday Night | 56°F | Mostly Clear | 5 to 10 mph NNE | 7% |
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 Nov 4, 2026.