Herndon Weather Forecast

    • 25
    • 43

    Mostly Sunny

    • 31
    • 49

    Mostly Sunny

    • 25
    • 43

    Partly Sunny

    • 22
    • 36

    Mostly Sunny

    • 28
    • 39

    Slight Chance Snow

    • 30
    • 41

    Chance Rain/Snow

Today 20 Jan Eastern Loudoun

Mostly sunny. Scattered Flurries late this morning. Highs in the lower 40s. Northwest Winds 15 to 20 Mph with Gusts up to 40 Mph.

Tonight 20 Jan Eastern Loudoun

Mostly clear. Lows in the lower 20s. West Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming south after midnight.

Graph Plots Open in Graphs
  • Temperature Forecast NOAA

  • Temperature Real-Time

Herndon Temperature Statistics

January Temperature

Washington/Dulles International Airport, DC (4.3 miles)

  • Lowest 12 January, 2021

    21.9 °F
  • Average January

    37 °F
  • Highest 2 January, 2021

    55.9 °F

Climate (2010–Present)

Washington/Dulles International Airport, DC (4.3 miles)

Take a look at our website widgetsAvailable free! Find Out More
  • Average Low 2010–Present

    47.8 °F
  • Average 2010–Present

    57 °F
  • Average High 2010–Present

    66.3 °F
Get an account to remove ads