Chantilly Weather Forecast

    • 34
    • 44

    Mostly Cloudy

    • 44
    • 53

    Mostly Cloudy

    • 36
    • 58

    Mostly Sunny

    • 47
    • 57

    Mostly Cloudy

    • 49
    • 59

    Chance Rain

    • 34
    • 59

    Slight Chance Rain

Today 5 Jan Eastern Loudoun

Mostly cloudy in the Morning, then becoming partly sunny. Highs in the mid 40s. South Winds 5 to 10 Mph.

Tonight 5 Jan Eastern Loudoun

Mostly cloudy. Lows in the lower 30s. South Winds 5 to 10 Mph.

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Chantilly Temperature Statistics

January Temperature

Washington/Dulles International Airport, DC (2.5 miles)

  • Lowest 1 January, 2026

    23 °F

  • Average January

    29 °F

  • Highest 2 January, 2026

    37 °F

Climate (2021–Present)

Washington/Dulles International Airport, DC (2.5 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.4 °F
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