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
52°F
Mostly Clear
Mostly clear, with a low around 52. North wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for San Luis Obispo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Clear | 5 mph N | 15% |
| Wednesday | 72°F | Mostly Sunny | 5 to 15 mph N | 0% |
| Wednesday Night | 55°F | Mostly Cloudy | 10 to 15 mph N | 0% |
| Thursday | 75°F | Mostly Sunny | 15 mph NNE | 0% |
| Thursday Night | 54°F | Mostly Clear | 10 to 15 mph NNE | 0% |
| Friday | 79°F | Sunny | 10 to 15 mph NNE | 0% |
| Friday Night | 54°F | Mostly Clear | 10 to 15 mph NNE | 0% |
| Saturday | 81°F | Sunny | 0 to 10 mph NNW | 0% |
| Saturday Night | 55°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Sunday | 81°F | Sunny | 0 to 10 mph N | 0% |
| Sunday Night | 57°F | Mostly Clear | 5 to 10 mph NNE | 0% |
| Monday | 80°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Monday Night | 56°F | Partly Cloudy | 5 mph N | 1% |
| Tuesday | 78°F | Sunny | 0 to 5 mph N | 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 Nov 4, 2026.