Helena Weather Forecast

    • 59
    • 83

    Slight Chance Rain Showers

    • 60
    • 88

    Mostly Sunny

    • 55
    • 82

    Slight Chance Thunderstorms

    • 54
    • 84

    Partly Sunny

    • 53
    • 80

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

Today 25 May Iowa

Partly sunny late in the morning and early afternoon then clearing. Highs in the lower 80s. Southwest Winds 5 to 15 Mph.

Tonight 25 May Iowa

Clear. Lows around 60. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • 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

    55.4 °F

  • Highest 16 May, 2026

    85.6 °F

Climate (2021–Present)

Lone Rock Tri-County Regional Airport (8.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    60.3 °F
Get WillyWeather+ to remove ads