Hercules Weather Forecast

    • 58
    • 64

    Decreasing Clouds

    • 58
    • 63

    Partly Sunny

    • 58
    • 66

    Mostly Sunny

    • 60
    • 79

    Partly Sunny

    • 60
    • 82

    Mostly Sunny

    • 59
    • 77

    Mostly Sunny

Today 20 Sep East Bay Interior Valleys

Mostly cloudy. Highs near 80. West Winds 5 to 10 Mph.

Tonight 20 Sep East Bay Interior Valleys

Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 50s. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Hercules Temperature Statistics

September Temperature

Concord, Buchanan Field (13 miles)

  • Lowest 7 September, 2026

    54.6 °F

  • Average September

    71.9 °F

  • Highest 9 September, 2026

    101.6 °F

Climate (2021–2026)

Concord, Buchanan Field (13 miles)

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

  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    61.6 °F

  • Average High 2021–2026

    74.2 °F
Get WillyWeather+ to remove ads