St Johns Weather Forecast

    • 59
    • 81

    Decreasing Clouds

    • 57
    • 79

    Partly Sunny

    • 62
    • 81

    Mostly Sunny

    • 67
    • 85

    Partly Sunny

    • 70
    • 88

    Partly Sunny

    • 71
    • 89

    Slight Chance Thunderstorms

Today 27 Aug Mercer

Partly cloudy. Highs in the lower 80s. Northwest Winds around 5 Mph.

Tonight 27 Aug Mercer

Partly cloudy in the Evening, then clearing. Lows in the upper 50s. Northwest Winds around 5 Mph.

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St Johns Temperature Statistics

August Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 24 August, 2026

    51.8 °F

  • Average August

    71.5 °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

    61.7 °F
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