Fallon Weather Forecast

    • 13
    • 47

    Slight Chance Freezing Rain

    • 15
    • 29

    Mostly Sunny

    • 23
    • 36

    Mostly Cloudy

    • 20
    • 43

    Mostly Cloudy

    • 24
    • 41

    Mostly Cloudy

    • 22
    • 43

    Mostly Cloudy

Today 19 Dec Prairie

Mostly cloudy. A slight chance of freezing rain this Morning, then a slight chance of rain this afternoon. Much warmer with Highs in the upper 40s. Southwest wind 10 to 15 Mph, becoming west 15 to 20 Mph with Gusts up to 35 Mph this afternoon. Chance of precipitation 20 percent.

Tonight 19 Dec Prairie

Mostly cloudy in the Evening, then clearing. Lows 10 to 15. West wind 10 to 15 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fallon Temperature Statistics

December Temperature

Glendive, Dawson Community Airport (25.5 miles)

  • Lowest 1 December, 2025

    -6 °F

  • Average December

    22 °F

  • Highest 15 December, 2025

    46 °F

Climate (2020–Present)

Glendive, Dawson Community Airport (25.5 miles)

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

  • Average Low 2020–2025

    33.5 °F

  • Average 2020–2025

    45 °F

  • Average High 2020–2025

    56.4 °F
Get WillyWeather+ to remove ads