St Johns Weather Forecast

    • 20
    • 64

    Rain Showers

    • 17
    • 26

    Chance Snow Showers

    • 22
    • 26

    Mostly Cloudy

    • 19
    • 31

    Chance Snow

    • 11
    • 24

    Slight Chance Snow

    • 19
    • 25

    Partly Sunny

Today 28 Dec Mercer

Patchy fog late this morning. Showers likely. Much warmer with Highs in the mid 60s. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 28 Dec Mercer

Rain Showers with a slight chance of Thunderstorms in the Evening, then a chance of rain Showers after midnight. Windy and much cooler with Lows 15 to 20. Southwest Winds 20 to 30 Mph with Gusts up to 45 Mph. Chance of rain 100 percent.

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St Johns Temperature Statistics

December Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 14 December, 2025

    -4 °F

  • Average December

    28.7 °F

  • Highest 26 December, 2025

    60.8 °F

Climate (2020–Present)

Versailles Darke County Airport (14.3 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    52.3 °F

  • Average High 2020–2025

    61.4 °F
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