Helena Regional Airport Weather Forecast

    • 38
    • 62

    Slight Chance Rain Showers

    • 40
    • 64

    Partly Sunny

    • 43
    • 62

    Rain Showers Likely

    • 45
    • 68

    Chance Rain Showers

    • 44
    • 68

    Rain Showers Likely

    • 47
    • 74

    Slight Chance Thunderstorms

    • 51
    • 80

    Slight Chance Thunderstorms

Today 20 May Helena Valley

Mostly cloudy. A 40 percent chance of rain Showers in the afternoon. Highs around 60. West Winds 10 to 20 Mph.

Tonight 20 May Helena Valley

Mostly clear. A 20 percent chance of Thunderstorms in the evening. Lows in the mid 30s. West Winds 5 to 15 Mph. Gusts up to 30 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Regional Airport Temperature Statistics

May Temperature

Helena Regional Airport (0 miles)

  • Lowest 6 May, 2025

    34.6 °F

  • Average May

    55.8 °F

  • Highest 10 May, 2025

    88.6 °F

Climate (2020–Present)

Helena Regional Airport (0 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.3 °F
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