San Marino Weather Forecast

    • 67
    • 94

    Rain Showers Likely

    • 65
    • 85

    Rain Showers Likely

    • 64
    • 85

    Chance Rain Showers

    • 65
    • 86

    Partly Sunny

    • 67
    • 88

    Slight Chance Rain Showers

    • 68
    • 90

    Mostly Sunny

Today 17 Sep Los Angeles County San Gabriel Valley

Mostly cloudy. Highs in the lower 90s.

Tonight 17 Sep Los Angeles County San Gabriel Valley

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the 60s to lower 70s. Chance of precipitation 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

San Marino Temperature Statistics

September Temperature

El Monte (5 miles)

  • Lowest 9 September, 2025

    66.2 °F

  • Average September

    81.2 °F

  • Highest 2 September, 2025

    100.4 °F

Climate (2020–Present)

El Monte (5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.3 °F

  • Average High 2020–2025

    77.1 °F
Get WillyWeather+ to remove ads