National Harbor Weather Forecast

    • 49
    • 63

    Decreasing Clouds

    • 52
    • 71

    Mostly Sunny

    • 63
    • 83

    Mostly Sunny

    • 65
    • 89

    Mostly Sunny

    • 68
    • 93

    Mostly Sunny

    • 71
    • 94

    Mostly Sunny

Today 14 May Arlington/Falls Church/Alexandria

Mostly cloudy with scattered Sprinkles. Highs in the lower 60s. Northwest Winds around 15 Mph with Gusts up to 25 Mph.

Tonight 14 May Arlington/Falls Church/Alexandria

Partly cloudy with scattered Sprinkles in the Evening, then mostly clear after midnight. Lows around 50. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

National Harbor Temperature Statistics

May Temperature

Washington/Reagan National Airport, DC (4.3 miles)

  • Lowest 1 May, 2026

    44.7 °F

  • Average May

    62 °F

  • Highest 5 May, 2026

    86.6 °F

Climate (2021–Present)

Washington/Reagan National Airport, DC (4.3 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    60.4 °F

  • Average High 2021–2026

    69.2 °F
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