St Johns Weather Forecast

    • 64
    • 84

    Slight Chance Thunderstorms

    • 67
    • 82

    Thunderstorms Likely

    • 67
    • 82

    Rain Showers Likely

    • 64
    • 82

    Chance Thunderstorms

    • 68
    • 83

    Chance Thunderstorms

    • 70
    • 84

    Rain Showers Likely

    • 64
    • 82

    Rain Showers Likely

Today 5 Aug Mercer

Mostly sunny. Highs in the mid 80s. Light and variable Winds, becoming west around 5 Mph this afternoon.

Tonight 5 Aug Mercer

Mostly clear late this Evening, then partly cloudy with a slight chance of Showers and Thunderstorms. Lows in the mid 60s. Light and variable Winds, becoming south around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Johns Temperature Statistics

August Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 3 August, 2026

    59 °F

  • Average August

    70 °F

  • Highest 3 August, 2026

    80.6 °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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