Mason Neck National Wildlife Refuge Weather Forecast

    • 55
    • 68

    Rain Showers Likely

    • 52
    • 61

    Rain Showers

    • 54
    • 66

    Rain Showers

    • 63
    • 75

    Chance Rain Showers

    • 64
    • 78

    Chance Thunderstorms

    • 64
    • 78

    Chance Rain Showers

Today 21 May Charles

Cloudy. A slight chance of Showers in the Morning, then a chance of Showers with a slight chance of Thunderstorms in the afternoon. Much cooler with Highs in the upper 60s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 21 May Charles

A slight chance of Thunderstorms. Showers Likely, mainly in the evening. Lows in the mid 50s. Northeast Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mason Neck National Wildlife Refuge Temperature Statistics

May Temperature

Fort Belvoir (5.6 miles)

  • Lowest 1 May, 2026

    37.4 °F

  • Average May

    61.9 °F

  • Highest 18 May, 2026

    94.8 °F

Climate (2021–Present)

Fort Belvoir (5.6 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.3 °F
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