Colonial Weather Forecast

    • 74
    • 99

    Hot

    • 61
    • 92

    Becoming Sunny

    • 57
    • 85

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 56
    • 82

    Mostly Sunny

    • 56
    • 78

    Partly Sunny

Today 9 Sep Santa Clara Valley Including San Jose

Sunny. Highs 98 to 103. Northwest Winds 5 to 15 Mph.

Tonight 9 Sep Santa Clara Valley Including San Jose

Mostly clear. Lows in the lower 70s. Northwest Winds 10 to 15 Mph decreasing to up to 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Colonial Temperature Statistics

September Temperature

San Jose, San Jose International Airport (4.3 miles)

  • Lowest 7 September, 2026

    54 °F

  • Average September

    68.6 °F

  • Highest 7 September, 2026

    86 °F

Climate (2021–2026)

San Jose, San Jose International Airport (4.3 miles)

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  • Average Low 2021–2026

    52.3 °F

  • Average 2021–2026

    62.1 °F

  • Average High 2021–2026

    72.8 °F
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