Cornerstone Weather Forecast

    • 59
    • 76

    Becoming Sunny

    • 56
    • 75

    Mostly Sunny

    • 57
    • 77

    Mostly Sunny

    • 68
    • 83

    Mostly Cloudy

    • 66
    • 87

    Chance Rain Showers

    • 59
    • 76

    Partly Sunny

Today 5 Sep Lake

Patchy fog this morning. Mostly cloudy with a slight chance of Showers this Morning, then mostly sunny this afternoon. Highs in the upper 70s. Northeast Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 5 Sep Lake

Mostly clear. Lows around 60. East Winds 5 to 10 Mph.

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Cornerstone Temperature Statistics

September Temperature

Ashtabula - Northeast Ohio Regional Airport (16.8 miles)

  • Lowest 3 September, 2026

    68 °F

  • Average September

    76.9 °F

  • Highest 2 September, 2026

    91.9 °F

Climate (2021–2026)

Ashtabula - Northeast Ohio Regional Airport (16.8 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    60.6 °F
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