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.
Today
72°F
Partly Sunny
Partly sunny, with a high near 72. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
7-day forecast for Los Osos
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Partly Sunny | 10 to 15 mph WNW | 1% |
| Tonight | 56°F | Patchy Fog | 5 to 10 mph NW | 1% |
| Sunday | 68°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph NW | 1% |
| Sunday Night | 55°F | Patchy Fog | 5 to 10 mph NW | 3% |
| Monday | 63°F | Patchy Fog then Partly Sunny | 5 to 10 mph NW | 0% |
| Monday Night | 54°F | Patchy Fog | 5 to 10 mph NW | 0% |
| Tuesday | 66°F | Patchy Fog | 5 to 10 mph NW | 0% |
| Tuesday Night | 56°F | Patchy Fog | 5 to 10 mph NNW | 0% |
| Wednesday | 75°F | Patchy Fog then Mostly Sunny | 5 to 10 mph NNW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Thursday | 74°F | Mostly Sunny | 5 mph SSW | 0% |
| Thursday Night | 58°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
| Friday | 72°F | Mostly Sunny | 0 to 10 mph SSW | 1% |
| Friday Night | 57°F | Mostly Cloudy | 5 mph SSW | 3% |
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
Nearby towns & communities
Arroyo Grande
Atascadero
Avila Beach
Blacklake
California Polytechnic State University
Callender
Cambria
Cayucos
Creston
Edna
El Paso de Robles (Paso Robles)
Garden Farms
Grover Beach
Los Berros
Los Ranchos
Morro Bay
Nipomo
Oceano
Pismo Beach
San Luis Obispo
San Miguel
San Simeon
Santa Margarita
Shandon
Templeton
Whitley Gardens
Woodlands
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 Sep 19, 2026.