San Marino, CA Weather & Growing Conditions
Tonight
54°F
Mostly Clear
Mostly clear, with a low around 54. North northwest wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Wednesday | 75°F | Sunny | 5 mph W | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 5 mph NNW | 0% |
| Thursday | 80°F | Mostly Sunny | 5 mph N | 0% |
| Thursday Night | 58°F | Mostly Clear | 5 to 10 mph NNW | 0% |
| Friday | 83°F | Sunny | 5 mph NNW | 0% |
| Friday Night | 57°F | Clear | 5 to 10 mph NNW | 0% |
| Saturday | 84°F | Sunny | 0 to 5 mph NNE | 0% |
| Saturday Night | 60°F | Mostly Clear | 5 to 10 mph N | 0% |
| Sunday | 85°F | Sunny | 0 to 5 mph SSW | 0% |
| Sunday Night | 62°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Monday | 83°F | Sunny | 0 to 5 mph S | 0% |
| Monday Night | 61°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Tuesday | 81°F | Sunny | 0 to 5 mph SSE | 2% |
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 Nov 4, 2026.