Belmont Bay Weather Forecast

    • 38
    • 43

    Mostly Cloudy

    • 46
    • 53

    Mostly Cloudy

    • 39
    • 58

    Mostly Sunny

    • 48
    • 56

    Chance Rain

    • 58
    • 64

    Rain Likely

    • 40
    • 63

    Chance Rain

Today 5 Jan Fairfax

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

Tonight 5 Jan Fairfax

Mostly cloudy. Lows in the mid 30s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Belmont Bay Temperature Statistics

January Temperature

Fort Belvoir (5 miles)

  • Lowest 1 January, 2026

    24.3 °F

  • Average January

    31 °F

  • Highest 2 January, 2026

    40.3 °F

Climate (2021–Present)

Fort Belvoir (5 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.2 °F
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