Del Marietta - Southwest Weather Forecast

    • 58
    • 77

    Slight Chance Rain

    • 55
    • 74

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 59
    • 83

    Mostly Sunny

    • 60
    • 84

    Partly Sunny

Today 3 Sep Santa Clara Valley Including San Jose

Partly cloudy. Patchy fog in the morning. Highs in the mid 70s to lower 80s. Southeast Winds up to 5 Mph. Becoming southwest 5 to 15 Mph in the afternoon.

Tonight 3 Sep Santa Clara Valley Including San Jose

Partly cloudy. Patchy fog. Lows in the mid 50s. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Del Marietta - Southwest Temperature Statistics

September Temperature

San Jose, San Jose International Airport (3.7 miles)

  • Lowest 1 September, 2026

    62.1 °F

  • Average September

    66.7 °F

  • Highest 1 September, 2026

    73.9 °F

Climate (2021–2026)

San Jose, San Jose International Airport (3.7 miles)

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

  • Average Low 2021–2026

    52.3 °F

  • Average 2021–2026

    62.1 °F

  • Average High 2021–2026

    72.8 °F
Get WillyWeather+ to remove ads