St Johns Weather Forecast

    • 37
    • 52

    Mostly Sunny

    • 56
    • 74

    Partly Sunny

    • 54
    • 74

    Partly Sunny

    • 60
    • 80

    Partly Sunny

    • 55
    • 79

    Chance Rain Showers

Today 20 Apr Mercer

Widespread frost in the morning. Mostly sunny. Highs in the lower 50s. North Winds around 5 Mph.

Tonight 20 Apr Mercer

Mostly clear. Lows in the upper 30s. Northwest Winds around 5 Mph, becoming south with Gusts up to 20 Mph after midnight.

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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

    58.1 °F

  • Highest 13 April, 2026

    80.6 °F

Climate (2021–Present)

Versailles Darke County Airport (14.3 miles)

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  • Average Low 2021–2026

    43.2 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    61.7 °F
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