Galster Wilderness Park Weather Forecast

    • 62
    • 89

    Mostly Sunny

    • 63
    • 88

    Becoming Sunny

    • 66
    • 93

    Mostly Sunny

    • 72
    • 97

    Hot

    • 73
    • 101

    Hot

    • 73
    • 100

    Hot

    • 72
    • 99

    Hot

Today 29 Sep Los Angeles County San Gabriel Valley

Sunny. Highs 95 to 100.

Tonight 29 Sep Los Angeles County San Gabriel Valley

Mostly clear. Lows in the upper 50s to mid 60s.

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Galster Wilderness Park Temperature Statistics

September Temperature

Brackett Field Airport (7.5 miles)

  • Lowest 2 September, 2026

    60.8 °F

  • Average September

    78.1 °F

  • Highest 9 September, 2026

    105.8 °F

Climate (2021–2026)

Brackett Field Airport (7.5 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    68.1 °F

  • Average High 2021–2026

    76 °F
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