Helena Weather Forecast

    • 70
    • 85

    Mostly Cloudy

    • 73
    • 92

    Chance Thunderstorms

    • 69
    • 92

    Slight Chance Thunderstorms

    • 64
    • 88

    Mostly Sunny

    • 64
    • 89

    Mostly Sunny

    • 66
    • 88

    Chance Rain Showers

Today 25 Jul Iowa

Mostly cloudy until late afternoon then becoming mostly sunny. Highs in the mid 80s. Southwest Winds 5 to 10 Mph.

Tonight 25 Jul Iowa

Partly cloudy until early morning then becoming mostly cloudy. Lows around 70. Southwest Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Temperature Statistics

July Temperature

Lone Rock Tri-County Regional Airport (8.7 miles)

  • Lowest 23 July, 2026

    48 °F

  • Average July

    75.2 °F

  • Highest 15 July, 2026

    95.6 °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

    49.4 °F

  • Average High 2021–2026

    60.4 °F
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