Helena Weather Forecast

    • 68
    • 88

    Thunderstorms Likely

    • 59
    • 82

    Partly Sunny

    • 64
    • 83

    Partly Sunny

    • 66
    • 87

    Chance Thunderstorms

    • 65
    • 85

    Chance Thunderstorms

    • 65
    • 85

    Chance Thunderstorms

Today 5 Jul Iowa

Warm and humid. Slight chance of light Showers and Thunderstorms late in the Morning, then Showers and Thunderstorms likely in the afternoon. Highs in the mid 80s. Southwest Winds 10 to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 70 percent. Highest heat index Readings around 95 early in the afternoon.

Tonight 5 Jul Iowa

Mostly cloudy. Showers through around midnight. Chance of Thunderstorms until early morning. Slight chance of light Showers after midnight. Lows in the upper 60s. Southwest Winds 5 to 15 Mph shifting to the west 5 to 10 Mph after midnight. Chance of precipitation 90 percent.

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Helena Temperature Statistics

July Temperature

Lone Rock Tri-County Regional Airport (8.7 miles)

  • Lowest 1 July, 2025

    60.1 °F

  • Average July

    75.1 °F

  • Highest 3 July, 2025

    89.1 °F

Climate (2020–Present)

Lone Rock Tri-County Regional Airport (8.7 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    49.1 °F

  • Average High 2020–2025

    59.9 °F
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