St Johns Weather Forecast

    • 59
    • 78

    Decreasing Clouds

    • 60
    • 79

    Partly Sunny

    • 58
    • 77

    Chance Thunderstorms

    • 54
    • 75

    Mostly Sunny

    • 56
    • 74

    Partly Sunny

    • 59
    • 77

    Partly Sunny

Today 20 Aug Mercer

Partly cloudy. Highs in the upper 70s. North Winds around 5 Mph.

Tonight 20 Aug Mercer

Mostly clear. Lows in the upper 50s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

St Johns Temperature Statistics

August Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 4 August, 2026

    53.6 °F

  • Average August

    72.6 °F

  • Highest 8 August, 2026

    87.8 °F

Climate (2021–2026)

Versailles Darke County Airport (14.3 miles)

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  • Average Low 2021–2026

    43.3 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    61.8 °F
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