Troy Airport Weather Forecast

    • 45
    • 61

    Chance Rain Showers

    • 40
    • 67

    Partly Sunny

    • 42
    • 69

    Mostly Cloudy

    • 41
    • 70

    Partly Sunny

    • 41
    • 71

    Partly Sunny

    • 42
    • 73

    Partly Sunny

Today 29 Sep Kootenai/Cabinet Region

Mostly cloudy. Highs in the upper 50s to mid 60s. Southwest Winds to 15 Mph.

Tonight 29 Sep Kootenai/Cabinet Region

Mostly cloudy with a 50 percent chance of rain. Lows in the 40s.

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Troy Airport Temperature Statistics

September Temperature

Boundary County Airport (24.2 miles)

  • Lowest 26 September, 2026

    39.2 °F

  • Average September

    57.4 °F

  • Highest 21 September, 2026

    80.6 °F

Climate (2021–2026)

Boundary County Airport (24.2 miles)

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  • Average Low 2021–2026

    37.9 °F

  • Average 2021–2026

    47.3 °F

  • Average High 2021–2026

    56.7 °F
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