National Arboretum Weather Forecast

    • 19
    • 30

    Partly Sunny

    • 27
    • 37

    Mostly Sunny

    • 30
    • 49

    Mostly Cloudy

    • 41
    • 55

    Rain

    • 27
    • 50

    Partly Sunny

    • 36
    • 44

    Chance Rain

    • 33
    • 52

    Slight Chance Rain

Today 15 Dec District of Columbia

Mostly cloudy. Highs around 30. West Winds around 5 Mph.

Tonight 15 Dec District of Columbia

Mostly cloudy this Evening, then clearing. Lows around 19. South Winds around 5 Mph this Evening, becoming light and variable.

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National Arboretum Temperature Statistics

December Temperature

College Park Airport (5 miles)

  • Lowest 9 December, 2025

    15.6 °F

  • Average December

    33.9 °F

  • Highest 10 December, 2025

    45.3 °F

Climate (2020–Present)

College Park Airport (5 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    67.2 °F
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