San Marino, CA Weather & Growing Conditions
Overnight
68°F
Partly Cloudy
Partly cloudy, with a low around 68. South wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 91°F | Sunny | 0 to 5 mph SSW | 0% |
| Tuesday Night | 67°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Wednesday | 90°F | Sunny | 0 to 5 mph SSW | 0% |
| Wednesday Night | 68°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 S | 0% |
| Friday | 93°F | Sunny | 0 to 5 mph S | 0% |
| Friday Night | 67°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Saturday | 94°F | Sunny | 0 to 5 mph SSW | 0% |
| Saturday Night | 67°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Sunday | 93°F | Sunny | 0 to 5 mph SSW | 0% |
| Sunday Night | 66°F | Mostly Clear | 0 to 5 mph S | 1% |
| Monday | 90°F | Sunny | 0 to 10 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Marino, CA
Last spring frost
Jan 8
First fall frost
Jan 7
Growing season
365 days
Hardiness zone
10a
Explore more for San Marino, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Pasadena, Ca (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.