St Johns Weather Forecast

    • 57
    • 73

    Rain Showers Likely

    • 38
    • 58

    Rain Showers

    • 33
    • 53

    Mostly Sunny

    • 38
    • 61

    Mostly Sunny

    • 42
    • 66

    Partly Sunny

    • 43
    • 67

    Mostly Sunny

Today 15 Oct Mercer

Mostly Cloudy, then becoming partly cloudy late this Morning, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming southeast late. Chance of rain 20 percent.

Tonight 15 Oct Mercer

Showers with a chance of Thunderstorms in the Evening, then Showers likely with a slight chance of Thunderstorms after midnight. More muggy with Lows in the upper 50s. South Winds 10 to 15 Mph, becoming southwest after midnight. Gusts up to 30 Mph. Chance of rain 80 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

St Johns Temperature Statistics

October Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 6 October, 2026

    41 °F

  • Average October

    62.5 °F

  • Highest 13 October, 2026

    87.8 °F

Climate (2021–2026)

Versailles Darke County Airport (14.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    43.3 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    61.8 °F
Get WillyWeather+ to remove ads