Colonial Weather Forecast

    • 59
    • 79

    Mostly Sunny

    • 58
    • 82

    Mostly Sunny

    • 62
    • 89

    Sunny

    • 62
    • 90

    Sunny

    • 60
    • 89

    Mostly Sunny

    • 59
    • 86

    Mostly Sunny

Today 13 Sep Santa Clara Valley Including San Jose

Mostly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s. East Winds around 5 Mph becoming northwest 5 to 15 Mph in the afternoon.

Tonight 13 Sep Santa Clara Valley Including San Jose

Clear in the evening then becoming partly cloudy. Lows in the upper 50s. Northwest Winds 5 to 15 Mph.

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Colonial Temperature Statistics

September Temperature

San Jose, San Jose International Airport (4.3 miles)

  • Lowest 3 September, 2025

    60.1 °F

  • Average September

    69.3 °F

  • Highest 1 September, 2025

    89.1 °F

Climate (2020–Present)

San Jose, San Jose International Airport (4.3 miles)

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  • Average Low 2020–2025

    51.8 °F

  • Average 2020–2025

    61.5 °F

  • Average High 2020–2025

    72.6 °F
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