St Johns Weather Forecast

    • 73
    • 90

    Chance Thunderstorms

    • 70
    • 90

    Chance Thunderstorms

    • 61
    • 82

    Mostly Sunny

    • 66
    • 84

    Chance Rain Showers

    • 59
    • 81

    Rain Showers Likely

    • 57
    • 75

    Chance Rain Showers

Today 10 Jun Mercer

Partly cloudy. A chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 30 percent. Heat index Values up to 101 this afternoon.

Tonight 10 Jun Mercer

Partly cloudy with a chance of Showers and Thunderstorms. Muggy. Lows in the lower 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Johns Temperature Statistics

June Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 3 June, 2026

    50 °F

  • Average June

    70.9 °F

  • Highest 7 June, 2026

    87.8 °F

Climate (2021–Present)

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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