Monrovia Weather Forecast

    • 70
    • 88

    Rain Showers

    • 68
    • 81

    Rain Showers

    • 65
    • 83

    Chance Rain Showers

    • 64
    • 87

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

    • 65
    • 90

    Mostly Sunny

Today 17 Sep Los Angeles County San Gabriel Valley

Partly cloudy in the morning then mostly cloudy. Highs in the upper 80s to mid 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.

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  • Temperature Forecast NOAA

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Monrovia Temperature Statistics

September Temperature

El Monte (4.3 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 (4.3 miles)

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  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.3 °F

  • Average High 2020–2025

    77.1 °F
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