Herndon Weather Forecast

    • 34
    • 57

    Mostly Sunny

    • 49
    • 56

    Rain Showers Likely

    • 37
    • 64

    Rain

    • 27
    • 44

    Mostly Sunny

    • 29
    • 46

    Mostly Sunny

    • 28
    • 47

    Mostly Sunny

    • 29
    • 48

    Mostly Sunny

Today 8 Dec Fairfax

Sunny. Highs in the upper 50s. Southeast Winds around 5 Mph.

Tonight 8 Dec Fairfax

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 30s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Herndon Temperature Statistics

December Temperature

Washington/Dulles International Airport, DC (4.3 miles)

  • Lowest 1 December, 2023

    33.7 °F

  • Average December

    46.4 °F

  • Highest 2 December, 2023

    60.7 °F

Climate (2018–Present)

Washington/Dulles International Airport, DC (4.3 miles)

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  • Average Low 2018–2023

    48 °F

  • Average 2018–2023

    58.1 °F

  • Average High 2018–2023

    68 °F
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