Lewistown Weather Forecast

    • 55
    • 75

    Chance Thunderstorms

    • 56
    • 78

    Chance Thunderstorms

    • 53
    • 83

    Chance Thunderstorms

    • 53
    • 80

    Chance Thunderstorms

    • 53
    • 80

    Chance Rain Showers

    • 52
    • 77

    Chance Thunderstorms

Today 30 Jul Fergus County below 4500ft

Mostly cloudy early in the morning then becoming partly cloudy. Slight chance of rain Showers early in the Morning, then slight chance of Thunderstorms in the afternoon. Highs 75 to 80. East Winds 5 to 15 Mph. Chance of precipitation 20 percent.

Tonight 30 Jul Fergus County below 4500ft

Partly cloudy. Lows 55 to 60. East Winds 5 to 15 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewistown Temperature Statistics

July Temperature

Lewistown, Lewistown Municipal Airport (1.2 miles)

  • Lowest 17 July, 2025

    43.6 °F

  • Average July

    66 °F

  • Highest 8 July, 2025

    93.7 °F

Climate (2020–Present)

Lewistown, Lewistown Municipal Airport (1.2 miles)

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

  • Average Low 2020–2025

    32.2 °F

  • Average 2020–2025

    44.4 °F

  • Average High 2020–2025

    56.3 °F
Get WillyWeather+ to remove ads