San Luis Obispo, CA Weather & Growing Conditions
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. West northwest wind 5 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 5 to 15 mph WNW | 0% |
| Tonight | 57°F | Patchy Fog | 5 mph N | 0% |
| Sunday | 75°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph NNW | 1% |
| Sunday Night | 56°F | Patchy Fog | 5 to 10 mph W | 2% |
| Monday | 67°F | Patchy Fog then Partly Sunny | 5 to 10 mph WNW | 1% |
| Monday Night | 54°F | Patchy Fog | 0 to 10 mph NW | 1% |
| Tuesday | 72°F | Patchy Fog then Mostly Sunny | 0 to 10 mph WNW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 5 to 10 mph N | 0% |
| Wednesday | 84°F | Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Thursday | 82°F | Sunny | 0 to 10 mph E | 0% |
| Thursday Night | 60°F | Partly Cloudy | 0 to 10 mph S | 0% |
| Friday | 78°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Friday Night | 58°F | Partly Cloudy | 5 to 10 mph SSW | 2% |
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 Sep 19, 2026.