St Johns Weather Forecast

    • 66
    • 78

    Rain Showers

    • 57
    • 75

    Partly Sunny

    • 56
    • 75

    Mostly Sunny

    • 60
    • 78

    Partly Sunny

    • 62
    • 77

    Rain Showers Likely

    • 58
    • 77

    Chance Rain Showers

Today 17 Jun Mercer

Mostly sunny this Morning, then mostly cloudy with Showers with a chance of Thunderstorms this afternoon. Highs in the upper 70s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, increasing to south 15 to 20 Mph with Gusts up to 30 Mph late. Chance of rain 80 percent.

Tonight 17 Jun Mercer

Showers with a chance of Thunderstorms. Locally heavy rainfall possible. Windy and more muggy with Lows in the mid 60s. South Winds 20 to 30 Mph, becoming southwest 15 to 25 Mph after midnight. Chance of rain 100 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

    71.9 °F

  • Highest 7 June, 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

    61.8 °F
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