Johnsville Weather Forecast

    • 12
    • 24

    Mostly Sunny

    • 29
    • 36

    Partly Sunny

    • 23
    • 46

    Partly Sunny

    • 9
    • 34

    Mostly Cloudy

    • 11
    • 17

    Snow Likely

    • 9
    • 20

    Chance Snow

Today 20 Jan Frederick

Sunny. Highs in the mid 20s. West Winds 10 to 15 Mph with Gusts up to 25 Mph. Wind chill Values as low as 2 below.

Tonight 20 Jan Frederick

Mostly clear. Cold with Lows around 12. West Winds around 5 Mph, becoming south after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnsville Temperature Statistics

January Temperature

Frederick Municipal Airport (10.6 miles)

  • Lowest 16 January, 2026

    15.8 °F

  • Average January

    34.4 °F

  • Highest 7 January, 2026

    57.2 °F

Climate (2021–Present)

Frederick Municipal Airport (10.6 miles)

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

  • Average Low 2021–2026

    46.4 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    67.4 °F
Get WillyWeather+ to remove ads