Helena Weather Forecast

    • 49
    • 68

    Rain Showers Likely

    • 47
    • 73

    Chance Rain Showers

    • 48
    • 79

    Sunny

    • 48
    • 80

    Mostly Sunny

    • 48
    • 77

    Partly Sunny

    • 48
    • 78

    Slight Chance Rain Showers

Today 15 Sep Helena Valley

Cooler. Mostly cloudy. Chance of rain Showers in the Morning, then rain Showers likely in the afternoon. Highs 65 to 70. West Winds 5 to 10 Mph. Chance of Showers 60 percent.

Tonight 15 Sep Helena Valley

Mostly cloudy. Chance of Thunderstorms in the Evening, then chance of rain Showers after midnight. Lows 45 to 50. West Winds up to 10 Mph. Chance of precipitation 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Temperature Statistics

September Temperature

Helena Regional Airport (1.9 miles)

  • Lowest 5 September, 2025

    46 °F

  • Average September

    66.4 °F

  • Highest 3 September, 2025

    91.9 °F

Climate (2020–Present)

Helena Regional Airport (1.9 miles)

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

  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
Get WillyWeather+ to remove ads