San Marino, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Marino, a city in Los Angeles County, California.
This Afternoon
87°F
Sunny
Sunny, with a high near 87. Southwest wind 5 to 10 mph.
7-day forecast for San Marino
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 87°F | Sunny | 5 to 10 mph SW | 0% |
| Tonight | 63°F | Patchy Fog | 0 to 5 mph SSW | 0% |
| Sunday | 85°F | Patchy Fog then Mostly Sunny | 5 to 10 mph SSW | 0% |
| Sunday Night | 62°F | Patchy Fog | 5 mph S | 2% |
| Monday | 82°F | Mostly Sunny | 5 to 10 mph SSW | 2% |
| Monday Night | 61°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Tuesday | 82°F | Mostly Sunny | 0 to 5 mph SSW | 0% |
| Tuesday Night | 64°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Wednesday | 89°F | Sunny | 0 to 5 mph WSW | 0% |
| Wednesday Night | 67°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Thursday | 91°F | Sunny | 0 to 5 mph SSW | 0% |
| Thursday Night | 67°F | Mostly Clear | 0 to 5 mph W | 0% |
| Friday | 89°F | Sunny | 0 to 5 mph S | 1% |
| Friday Night | 67°F | Partly Cloudy | 0 to 5 mph SSE | 1% |
Forecast source: National Weather Service (api.weather.gov) for San Marino (34.123, -118.113). Updated through the day.
Growing snapshot for San Marino
Last spring frost
Jan 8
First fall frost
Jan 7
Growing season
365 days
Hardiness zone
10a
More local growing data for San Marino: nearby ZIP 91108 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Acton
Agoura Hills
Agua Dulce
Alhambra
Alondra Park
Altadena
Arcadia
Artesia
Avalon
Avocado Heights
Azusa
Baldwin Park
Bell
Bell Canyon
Bell Gardens
Bellflower
Beverly Hills
Bradbury
Burbank
Calabasas
Carson
Castaic
Cerritos
Charter Oak
Citrus
Claremont
Commerce
Compton
Covina
Cudahy
Climate data from the nearest NOAA station, Pasadena, Ca (2.5 mi from San Marino). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.