St Johns Weather Forecast

    • 57
    • 78

    Becoming Sunny

    • 61
    • 81

    Mostly Sunny

    • 64
    • 82

    Slight Chance Rain Showers

    • 62
    • 77

    Rain Showers Likely

    • 61
    • 79

    Chance Rain Showers

    • 61
    • 80

    Slight Chance Thunderstorms

    • 64
    • 82

    Slight Chance Thunderstorms

Today 29 Jul Mercer

Partly cloudy. Near steady Temperatures in the upper 70s. North Winds 5 to 10 Mph.

Tonight 29 Jul Mercer

Clear. Lows in the upper 50s. North Winds around 5 Mph until early Morning, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Johns Temperature Statistics

July Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 23 July, 2026

    50 °F

  • Average July

    74.5 °F

  • Highest 3 July, 2026

    93.2 °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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