Jana Airport Weather Forecast

    • 7
    • 41

    Becoming Sunny

    • 18
    • 25

    Slight Chance Snow

    • 31
    • 38

    Mostly Cloudy

    • 24
    • 40

    Mostly Cloudy

    • 36
    • 42

    Slight Chance Rain

    • 32
    • 49

    Mostly Cloudy

    • 28
    • 42

    Mostly Cloudy

Today 20 Dec Dane

Not as cold. Partly sunny early in the afternoon then clearing. Highs in the mid 30s. West Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 20 Dec Dane

Clear. Lows around 7. Northwest Winds 10 to 20 Mph with Gusts to around 35 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Jana Airport Temperature Statistics

December Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 14 December, 2025

    -7.6 °F

  • Average December

    19.1 °F

  • Highest 18 December, 2025

    46.4 °F

Climate (2020–Present)

Janesville-Rock County (17.4 miles)

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

  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.2 °F
Get WillyWeather+ to remove ads