Herndon Weather Forecast

    • 54
    • 75

    Mostly Cloudy

    • 50
    • 76

    Mostly Sunny

    • 52
    • 77

    Sunny

    • 62
    • 82

    Mostly Sunny

    • 68
    • 86

    Mostly Cloudy

    • 67
    • 84

    Chance Rain Showers

Today 26 Sep Christian

Partly sunny. Near steady temperature in the mid 70s. Northeast Winds around 5 Mph.

Tonight 26 Sep Christian

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the lower 50s. Northeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Herndon Temperature Statistics

September Temperature

Fort Campbell U. S. Army Airfield (5.6 miles)

  • Lowest 23 September, 2026

    61.9 °F

  • Average September

    81.7 °F

  • Highest 4 September, 2026

    99.1 °F

Climate (2021–2026)

Fort Campbell U. S. Army Airfield (5.6 miles)

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

  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    70.5 °F
Get WillyWeather+ to remove ads