Colchester Weather Forecast

    • 37
    • 44

    Chance Snow

    • 39
    • 55

    Chance Rain

    • 36
    • 54

    Chance Rain

    • 39
    • 54

    Chance Rain

    • 38
    • 46

    Rain Likely

    • 40
    • 50

    Chance Rain

    • 30
    • 55

    Chance Rain

Today 22 Dec Fairfax

Mostly sunny. Highs in the mid 40s. South Winds around 5 Mph.

Tonight 22 Dec Fairfax

Cloudy. A chance of Rain, snow and freezing drizzle after midnight. Lows in the mid 30s. South Winds 5 to 10 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Colchester Temperature Statistics

December Temperature

Fort Belvoir (3.7 miles)

  • Lowest 16 December, 2025

    17.1 °F

  • Average December

    35.1 °F

  • Highest 19 December, 2025

    60.3 °F

Climate (2020–Present)

Fort Belvoir (3.7 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    68.2 °F
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