Herndon Weather Forecast

    • 56
    • 80

    Increasing Clouds

    • 49
    • 79

    Mostly Sunny

    • 50
    • 74

    Mostly Sunny

    • 66
    • 83

    Chance Rain Showers

    • 68
    • 88

    Slight Chance Thunderstorms

    • 70
    • 90

    Slight Chance Thunderstorms

Today 12 May Christian

Sunny. Highs in the upper 70s. South Winds around 5 Mph.

Tonight 12 May Christian

Mostly clear. Lows in the mid 50s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Herndon Temperature Statistics

May Temperature

Fort Campbell U. S. Army Airfield (5.6 miles)

  • Lowest 2 May, 2026

    43.2 °F

  • Average May

    60.9 °F

  • Highest 4 May, 2026

    81.5 °F

Climate (2021–Present)

Fort Campbell U. S. Army Airfield (5.6 miles)

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  • Average Low 2021–2026

    50.8 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    70.2 °F
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