Alum Rock Weather Forecast

    • 56
    • 77

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

    • 58
    • 85

    Partly Sunny

    • 57
    • 81

    Mostly Sunny

Today 16 Sep Santa Clara Valley Including San Jose

Partly cloudy in the morning then becoming sunny. Highs in the mid to upper 70s. Southeast Winds 5 to 10 Mph becoming west 5 to 15 Mph in the afternoon.

Tonight 16 Sep Santa Clara Valley Including San Jose

Mostly clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the mid 50s. Northwest Winds 5 to 15 Mph. Becoming southeast 5 to 10 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Alum Rock Temperature Statistics

September Temperature

San Jose / Reid / Hillv (2.5 miles)

  • Lowest 7 September, 2026

    53.6 °F

  • Average September

    73.8 °F

  • Highest 9 September, 2026

    98.6 °F

Climate (2021–2026)

San Jose / Reid / Hillv (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    52.1 °F

  • Average 2021–2026

    63.7 °F

  • Average High 2021–2026

    72.2 °F
Get WillyWeather+ to remove ads