Belmont Bay Weather Forecast

    • 73
    • 91

    Thunderstorms

    • 70
    • 78

    Chance Rain Showers

    • 70
    • 75

    Chance Rain Showers

    • 69
    • 80

    Chance Rain Showers

    • 68
    • 81

    Chance Rain Showers

    • 69
    • 82

    Slight Chance Thunderstorms

    • 71
    • 82

    Chance Rain Showers

Today 17 Aug Fairfax

Partly sunny with isolated Showers and Thunderstorms. Highs in the mid 90s. West Winds around 5 Mph. Chance of rain 20 percent.

Tonight 17 Aug Fairfax

Mostly cloudy. Scattered Showers with isolated Thunderstorms this evening. Some Thunderstorms may produce gusty Winds and heavy rainfall this evening. Lows around 70. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Belmont Bay Temperature Statistics

August Temperature

Fort Belvoir (5 miles)

  • Lowest 10 August, 2025

    58.1 °F

  • Average August

    74.2 °F

  • Highest 14 August, 2025

    92.5 °F

Climate (2020–Present)

Fort Belvoir (5 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    68.3 °F
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