Helena West Side Weather Forecast

    • 55
    • 85

    Slight Chance Thunderstorms

    • 55
    • 91

    Slight Chance Thunderstorms

    • 53
    • 87

    Rain Showers Likely

    • 44
    • 65

    Rain Showers

    • 43
    • 61

    Chance Rain

    • 44
    • 65

    Chance Rain

    • 46
    • 69

    Slight Chance Thunderstorms

Today 27 May Helena Valley

Mostly sunny with a 20 percent chance of Thunderstorms. Highs in the mid 80s. East Winds up to 10 Mph.

Tonight 27 May Helena Valley

Partly cloudy. Slight chance of Thunderstorms early in the Evening, then slight chance of rain Showers late in the evening. Lows in the lower 50s. Northeast Winds up to 5 Mph shifting to the west after midnight. Chance of precipitation 20 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

    54.6 °F

  • Highest 13 May, 2026

    84.7 °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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