Mosby Weather Forecast

    • 35
    • 44

    Becoming Sunny

    • 25
    • 49

    Mostly Sunny

    • 32
    • 42

    Chance Rain

    • 38
    • 51

    Partly Sunny

    • 37
    • 49

    Slight Chance Rain

    • 48
    • 57

    Mostly Cloudy

Today 20 Dec Arlington/Falls Church/Alexandria

Sunny. Highs in the mid 40s. South Winds 5 to 10 Mph.

Tonight 20 Dec Arlington/Falls Church/Alexandria

Mostly clear. Lows in the mid 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mosby Temperature Statistics

December Temperature

Washington/Reagan National Airport, DC (8.1 miles)

  • Lowest 15 December, 2025

    18 °F

  • Average December

    34.8 °F

  • Highest 18 December, 2025

    57 °F

Climate (2020–Present)

Washington/Reagan National Airport, DC (8.1 miles)

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  • Average Low 2020–2025

    52.5 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    69.1 °F
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