Helena West Side Weather Forecast

    • 43
    • 88

    Rain Showers

    • 42
    • 65

    Breezy

    • 38
    • 64

    Breezy

    • 33
    • 58

    Chance Snow

    • 31
    • 45

    Chance Rain/Snow

    • 34
    • 53

    Mostly Cloudy

    • 38
    • 61

    Partly Sunny

Today 13 May Helena Valley

Breezy. Showers likely and slight chance of Thunderstorms early in the Afternoon, then Showers likely and chance of Thunderstorms late in the afternoon. Some Thunderstorms may produce gusty Winds late in the afternoon. Highs in the upper 80s. West Winds 10 to 25 Mph with Gusts to around 40 Mph. Chance of precipitation 70 percent.

Tonight 13 May Helena Valley

Windy. Mostly cloudy early in the evening then clearing. Rain Showers likely and slight chance of Thunderstorms early in the Evening, then slight chance of rain Showers late in the evening. Some Thunderstorms may be severe with gusty Winds. Lows in the lower 40s. West Winds 20 to 30 Mph with Gusts to around 60 Mph. Chance of precipitation 70 percent.

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Helena West Side Temperature Statistics

May Temperature

Helena Regional Airport (5.6 miles)

  • Lowest 6 May, 2026

    27.6 °F

  • Average May

    55.4 °F

  • Highest 10 May, 2026

    79.6 °F

Climate (2021–Present)

Helena Regional Airport (5.6 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    60.1 °F
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