Glendora Weather Forecast

    • 57
    • 80

    Becoming Sunny

    • 54
    • 80

    Mostly Sunny

    • 54
    • 74

    Partly Sunny

    • 54
    • 73

    Mostly Cloudy

    • 53
    • 73

    Mostly Cloudy

    • 54
    • 69

    Chance Rain

Today 18 Dec Los Angeles County San Gabriel Valley

Partly cloudy except for patchy low Clouds and fog in the morning. Fog locally dense with visibility one quarter mile or less. Highs around 80.

Tonight 18 Dec Los Angeles County San Gabriel Valley

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

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Glendora Temperature Statistics

December Temperature

Brackett Field Airport (5.6 miles)

  • Lowest 5 December, 2025

    42.8 °F

  • Average December

    64 °F

  • Highest 10 December, 2025

    86 °F

Climate (2020–Present)

Brackett Field Airport (5.6 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    67.6 °F

  • Average High 2020–2025

    75.6 °F
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