Northwest Park Weather Forecast

    • 48
    • 73

    Mostly Cloudy

    • 49
    • 77

    Rain Showers Likely

    • 49
    • 75

    Chance Thunderstorms

    • 52
    • 75

    Rain Showers Likely

    • 47
    • 69

    Rain Showers Likely

    • 46
    • 70

    Slight Chance Thunderstorms

    • 48
    • 73

    Partly Sunny

Today 3 Sep Helena Valley

Sunny early in the afternoon then becoming partly sunny. Highs in the lower 70s. Southwest Winds 5 to 10 Mph with Gusts to around 25 Mph.

Tonight 3 Sep Helena Valley

Mostly cloudy. Lows in the upper 40s. West Winds up to 10 Mph.

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Northwest Park Temperature Statistics

September Temperature

Helena Regional Airport (2.5 miles)

  • Lowest 1 September, 2026

    48.9 °F

  • Average September

    65.9 °F

  • Highest 1 September, 2026

    84.9 °F

Climate (2021–2026)

Helena Regional Airport (2.5 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    60 °F
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