Troy Airport Weather Forecast

    • 33
    • 59

    Increasing Clouds

    • 34
    • 68

    Partly Sunny

    • 40
    • 69

    Partly Sunny

    • 41
    • 64

    Mostly Cloudy

    • 41
    • 65

    Chance Rain

    • 39
    • 65

    Slight Chance Rain

Today 26 Sep Kootenai/Cabinet Region

Partly cloudy. Highs in the mid 50s to lower 60s.

Tonight 26 Sep Kootenai/Cabinet Region

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the 30s.

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Troy Airport Temperature Statistics

September Temperature

Boundary County Airport (24.2 miles)

  • Lowest 17 September, 2026

    41 °F

  • Average September

    57.9 °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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