Mount Heinen Weather Forecast

    • 48
    • 63

    Chance Rain Showers

    • 54
    • 73

    Chance Thunderstorms

    • 46
    • 74

    Partly Sunny

    • 48
    • 65

    Chance Rain Showers

    • 46
    • 60

    Slight Chance Rain Showers

    • 47
    • 67

    Mostly Sunny

Today 26 May Boise Mountains

Partly cloudy with a chance of rain Showers and Thunderstorms. Thunderstorms may produce gusty Winds. Chance of rain 30 percent. Cooler with Highs 59 to 74.

Tonight 26 May Boise Mountains

Mostly cloudy. A chance of rain Showers and Thunderstorms in the evening. Patchy fog in the evening. Areas of fog after midnight. Thunderstorms may produce gusty Winds in the evening. Chance of rain 40 percent. Lows 41 to 51.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Heinen Temperature Statistics

May Temperature

Boise Air Terminal (19.3 miles)

  • Lowest 17 May, 2026

    38.6 °F

  • Average May

    63.5 °F

  • Highest 12 May, 2026

    96.7 °F

Climate (2021–Present)

Boise Air Terminal (19.3 miles)

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

  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    66.3 °F
Get WillyWeather+ to remove ads