Los Osos, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Los Osos, a community in San Luis Obispo County, California.
This Afternoon
65°F
Slight Chance Rain Showers
A slight chance of rain showers after 4pm. Partly sunny, with a high near 65. West northwest wind around 15 mph. Chance of precipitation is 20%.
7-day forecast for Los Osos
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Slight Chance Rain Showers | 15 mph WNW | 15% |
| Tonight | 52°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 15 mph NNW | 15% |
| Wednesday | 69°F | Mostly Sunny | 5 to 15 mph NNW | 0% |
| Wednesday Night | 54°F | Mostly Cloudy then Patchy Fog | 10 to 15 mph N | 0% |
| Thursday | 72°F | Patchy Fog then Mostly Sunny | 10 to 15 mph N | 0% |
| Thursday Night | 54°F | Mostly Clear | 10 mph NNE | 0% |
| Friday | 75°F | Sunny | 10 mph NNE | 0% |
| Friday Night | 55°F | Mostly Clear | 10 mph NNE | 0% |
| Saturday | 77°F | Sunny | 5 to 10 mph N | 0% |
| Saturday Night | 56°F | Mostly Clear | 5 mph N | 0% |
| Sunday | 77°F | Sunny | 5 mph NNE | 0% |
| Sunday Night | 57°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Monday | 75°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Monday Night | 56°F | Mostly Cloudy | 5 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Los Osos (35.307, -120.825). Updated through the day.
Growing snapshot for Los Osos
Last spring frost
Jan 19
First fall frost
Jan 14
Growing season
365 days
Hardiness zone
10a
More local growing data for Los Osos: nearby ZIP 93402 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Morro Bay Fire Dept, Ca (5 mi from Los Osos). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.