Helena Weather Forecast

    • 66
    • 83

    Mostly Cloudy

    • 64
    • 76

    Rain Showers Likely

    • 63
    • 80

    Rain Showers

    • 67
    • 82

    Rain Showers Likely

    • 60
    • 80

    Slight Chance Thunderstorms

    • 59
    • 78

    Partly Sunny

Today 12 Aug Iowa

Mostly sunny. Near steady temperature in the lower 80s. Northeast Winds up to 5 Mph.

Tonight 12 Aug Iowa

Partly cloudy until early morning then becoming mostly cloudy. Patchy smoke through around midnight. Patchy fog early in the morning. Lows in the upper 60s. East 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

    71 °F

  • Highest 10 August, 2026

    84.9 °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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