St Johns Weather Forecast

    • 59
    • 77

    Chance Rain Showers

    • 63
    • 78

    Partly Sunny

    • 65
    • 82

    Chance Rain Showers

    • 64
    • 83

    Partly Sunny

    • 69
    • 84

    Partly Sunny

    • 64
    • 86

    Chance Rain Showers

Today 10 Sep Mercer

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the upper 70s. Light and variable Winds, becoming west around 5 Mph this afternoon. Chance of rain 50 percent.

Tonight 10 Sep Mercer

Partly cloudy. A slight chance of Showers in the evening. Lows in the upper 50s. North Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Johns Temperature Statistics

September Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 7 September, 2026

    57.2 °F

  • Average September

    76.7 °F

  • Highest 1 September, 2026

    93.2 °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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