Colchester Weather Forecast

    • 74
    • 93

    Decreasing Clouds

    • 75
    • 96

    Slight Chance Thunderstorms

    • 73
    • 92

    Rain Showers Likely

    • 72
    • 89

    Chance Thunderstorms

    • 72
    • 89

    Chance Thunderstorms

    • 69
    • 87

    Slight Chance Thunderstorms

Today 9 Aug Fairfax

Mostly sunny. Highs in the lower 90s. West Winds around 5 Mph.

Tonight 9 Aug Fairfax

Mostly clear. Lows in the lower 70s. Southwest Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Colchester Temperature Statistics

August Temperature

Fort Belvoir (3.7 miles)

  • Lowest 1 August, 2026

    65.5 °F

  • Average August

    79.6 °F

  • Highest 6 August, 2026

    92.5 °F

Climate (2021–2026)

Fort Belvoir (3.7 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    68.3 °F
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