St Johns Weather Forecast

    • 13
    • 32

    Snow Likely

    • 15
    • 24

    Mostly Cloudy

    • 14
    • 28

    Partly Sunny

    • 15
    • 27

    Mostly Cloudy

    • 22
    • 30

    Mostly Cloudy

    • 28
    • 39

    Mostly Cloudy

Today 31 Dec Mercer

Mostly cloudy with a 40 percent chance of snow. Highs in the lower 30s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 31 Dec Mercer

Cloudy with snow this Evening, then partly cloudy after midnight. Snow accumulation an inch or less. Lows 10 to 15. West Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming northwest 10 to 15 Mph with Gusts up to 30 Mph after midnight. Chance of snow 80 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

St Johns Temperature Statistics

December Temperature

Versailles Darke County Airport (14.3 miles)

  • Lowest 14 December, 2025

    -4 °F

  • Average December

    29.7 °F

  • Highest 28 December, 2025

    68 °F

Climate (2021–Present)

Versailles Darke County Airport (14.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2025

    43.2 °F

  • Average 2021–2025

    52.3 °F

  • Average High 2021–2025

    61.4 °F
Get WillyWeather+ to remove ads