Helena Weather Forecast

    • 64
    • 80

    Mostly Cloudy

    • 65
    • 83

    Mostly Cloudy

    • 65
    • 82

    Chance Thunderstorms

    • 61
    • 82

    Slight Chance Thunderstorms

    • 57
    • 76

    Partly Sunny

    • 57
    • 74

    Chance Rain Showers

Today 9 Aug Iowa

Mostly cloudy. Light Showers likely and chance of Thunderstorms early in the Afternoon, then slight chance of light Showers and Thunderstorms late in the afternoon. Highs around 80. South Winds 5 to 10 Mph. Chance of precipitation 70 percent.

Tonight 9 Aug Iowa

Mostly cloudy with a 20 percent chance of light Showers and Thunderstorms in the Evening, then mostly cloudy in the late evening and overnight. Patchy fog after midnight. Lows in the mid 60s. Northeast Winds up to 5 Mph.

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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

    70.8 °F

  • Highest 4 August, 2026

    84.7 °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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