Helena Weather Forecast

    • 59
    • 80

    Rain Showers Likely

    • 55
    • 79

    Partly Sunny

    • 60
    • 81

    Chance Rain Showers

    • 60
    • 81

    Chance Rain Showers

    • 56
    • 79

    Mostly Sunny

    • 57
    • 77

    Partly Sunny

Today 18 Aug Iowa

Mostly cloudy. Chance of light Showers and Thunderstorms early in the Afternoon, then Showers likely and chance of Thunderstorms late in the afternoon. Highs around 80. West Winds 5 to 10 Mph. Chance of precipitation 60 percent.

Tonight 18 Aug Iowa

Mostly cloudy with chance of light Showers and slight chance of Thunderstorms in the Evening, then partly cloudy in the late evening and overnight. Lows around 60. West Winds up to 5 Mph. Chance of precipitation 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Temperature Statistics

August Temperature

Lone Rock Tri-County Regional Airport (8.7 miles)

  • Lowest 3 August, 2026

    57.7 °F

  • Average August

    72.2 °F

  • Highest 10 August, 2026

    85.6 °F

Climate (2021–2026)

Lone Rock Tri-County Regional Airport (8.7 miles)

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  • Average Low 2021–2026

    38.6 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    60.4 °F
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