Helena Weather Forecast

    • 60
    • 81

    Partly Sunny

    • 57
    • 81

    Decreasing Clouds

    • 61
    • 79

    Partly Sunny

    • 68
    • 86

    Rain Showers Likely

    • 57
    • 84

    Partly Sunny

    • 54
    • 80

    Mostly Sunny

    • 58
    • 81

    Partly Sunny

Today 5 Sep Iowa

Partly sunny. Northeast Winds 5 to 10 Mph.

Tonight 5 Sep Iowa

Partly cloudy then becoming mostly cloudy after midnight then becoming partly cloudy. Areas of fog after midnight. Lows in the lower 60s. East Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Temperature Statistics

September Temperature

Lone Rock Tri-County Regional Airport (8.7 miles)

  • Lowest 3 September, 2026

    69.1 °F

  • Average September

    77.8 °F

  • Highest 1 September, 2026

    89.7 °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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