Chagrin River Weather Forecast

    • 58
    • 78

    Mostly Sunny

    • 60
    • 80

    Mostly Sunny

    • 59
    • 81

    Partly Sunny

    • 59
    • 80

    Partly Sunny

    • 60
    • 81

    Partly Sunny

    • 57
    • 78

    Mostly Cloudy

Today 14 Sep Lake

Patchy fog this morning. Mostly sunny. Highs in the upper 70s. East Winds around 5 Mph, becoming northeast this afternoon.

Tonight 14 Sep Lake

Mostly clear. Lows in the upper 50s. East Winds 5 to 10 Mph.

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Chagrin River Temperature Statistics

September Temperature

Willoughby (2.5 miles)

  • Lowest 9 September, 2025

    47.1 °F

  • Average September

    62.2 °F

  • Highest 3 September, 2025

    81.7 °F

Climate (2020–Present)

Willoughby (2.5 miles)

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  • Average Low 2020–2025

    43.8 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    59.3 °F
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