Helena National Forest Weather Forecast

    • 53
    • 76

    Rain Showers Likely

    • 51
    • 75

    Chance Thunderstorms

    • 51
    • 79

    Chance Rain Showers

    • 54
    • 86

    Sunny

    • 55
    • 88

    Mostly Sunny

    • 56
    • 88

    Partly Sunny

Today 21 Jul Big Belt

Mostly cloudy. A 50 percent chance of Thunderstorms in the afternoon. Highs 70 to 80. Northeast Winds 5 to 15 Mph.

Tonight 21 Jul Big Belt

Mostly cloudy. Rain Showers likely and chance of Thunderstorms in the Evening, then slight chance of rain Showers after midnight. Lows 50 to 55. Northwest Winds 5 to 15 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena National Forest Temperature Statistics

July Temperature

Helena Regional Airport (15.5 miles)

  • Lowest 5 July, 2025

    49.6 °F

  • Average July

    71.9 °F

  • Highest 8 July, 2025

    97.6 °F

Climate (2020–Present)

Helena Regional Airport (15.5 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
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