St Johns Weather Forecast

    • 39
    • 69

    Rain Showers Likely

    • 50
    • 62

    Partly Sunny

    • 64
    • 81

    Chance Rain Showers

    • 64
    • 76

    Chance Rain Showers

    • 66
    • 81

    Chance Thunderstorms

    • 59
    • 80

    Chance Rain Showers

    • 58
    • 78

    Chance Rain Showers

Today 10 Apr Mercer

Mostly cloudy with Showers with a chance of Thunderstorms. Highs in the upper 60s. West Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 80 percent.

Tonight 10 Apr Mercer

Partly cloudy with a slight chance of Showers this Evening, then mostly clear after midnight. Cooler with Lows in the upper 30s. North Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Johns Temperature Statistics

April Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 7 April, 2026

    28.4 °F

  • Average April

    51.4 °F

  • Highest 3 April, 2026

    78.8 °F

Climate (2021–Present)

Versailles Darke County Airport (14.3 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    61.6 °F
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