Helena Weather Forecast

    • 38
    • 67

    Partly Sunny

    • 52
    • 73

    Rain Showers Likely

    • 53
    • 82

    Slight Chance Thunderstorms

    • 54
    • 86

    Rain Showers Likely

    • 59
    • 80

    Rain Showers Likely

    • 55
    • 84

    Rain Showers Likely

Today 13 May Iowa

Cooler. Partly sunny. Highs in the mid 60s. Northwest Winds 10 to 15 Mph with Gusts to around 30 Mph.

Tonight 13 May Iowa

Colder, clear. Lows in the upper 30s. Northeast Winds up to 5 Mph. Gusts up to 20 Mph through around midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Temperature Statistics

May Temperature

Lone Rock Tri-County Regional Airport (8.7 miles)

  • Lowest 6 May, 2026

    27.6 °F

  • Average May

    49.5 °F

  • Highest 4 May, 2026

    81.6 °F

Climate (2021–Present)

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

    60.3 °F
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