Helena West Side Weather Forecast

    • 58
    • 91

    Chance Thunderstorms

    • 58
    • 85

    Chance Rain Showers

    • 50
    • 78

    Rain Showers

    • 47
    • 71

    Chance Rain Showers

    • 53
    • 80

    Mostly Sunny

    • 53
    • 81

    Partly Sunny

Today 27 Aug Helena Valley

Partly sunny. Slight chance of Thunderstorms early in the afternoon. Slight chance of dry Thunderstorms late in the afternoon. Highs in the upper 80s. Southeast Winds up to 10 Mph. Chance of Thunderstorms 20 percent.

Tonight 27 Aug Helena Valley

Mostly cloudy with a 40 percent chance of Thunderstorms in the Evening, then mostly clear after midnight. Patchy smoke after midnight. Lows in the mid 50s. South Winds up to 10 Mph.

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Helena West Side Temperature Statistics

August Temperature

Helena Regional Airport (5.6 miles)

  • Lowest 4 August, 2026

    45.6 °F

  • Average August

    71 °F

  • Highest 1 August, 2026

    103.6 °F

Climate (2021–2026)

Helena Regional Airport (5.6 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    59.9 °F
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