Helena Weather Forecast

    • 34
    • 42

    Chance Rain

    • 36
    • 48

    Mostly Cloudy

    • 40
    • 61

    Mostly Cloudy

    • 38
    • 68

    Mostly Cloudy

    • 25
    • 52

    Partly Sunny

    • 27
    • 45

    Mostly Cloudy

Today 18 Mar Iowa

Not as cold. Partly sunny. Highs in the lower 40s. Southwest Winds 5 to 10 Mph.

Tonight 18 Mar Iowa

Not as cold. Mostly cloudy. A 50 percent chance of light rain in the late evening and overnight. Lows in the mid 30s. South Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Temperature Statistics

March Temperature

Lone Rock Tri-County Regional Airport (8.7 miles)

  • Lowest 1 March, 2026

    -6.4 °F

  • Average March

    38.4 °F

  • Highest 9 March, 2026

    70 °F

Climate (2021–Present)

Lone Rock Tri-County Regional Airport (8.7 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    60.2 °F
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