Helena West Side Weather Forecast

    • 49
    • 77

    Slight Chance Thunderstorms

    • 53
    • 79

    Chance Rain Showers

    • 50
    • 70

    Rain Showers Likely

    • 48
    • 73

    Chance Rain Showers

    • 51
    • 80

    Mostly Sunny

    • 50
    • 79

    Partly Sunny

Today 13 Sep Helena Valley

Partly cloudy in the Morning, then mostly cloudy with a 20 percent chance of Thunderstorms in the afternoon. Highs in the mid 70s. West Winds up to 5 Mph shifting to the southeast in the afternoon.

Tonight 13 Sep Helena Valley

Partly cloudy. Lows 45 to 50. South Winds up to 5 Mph.

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Helena West Side Temperature Statistics

September Temperature

Helena Regional Airport (5.6 miles)

  • Lowest 5 September, 2025

    46 °F

  • Average September

    66.8 °F

  • Highest 3 September, 2025

    91.9 °F

Climate (2020–Present)

Helena Regional Airport (5.6 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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