Herndon Weather Forecast

    • 42
    • 50

    Rain

    • 43
    • 52

    Rain

    • 45
    • 52

    Slight Chance Rain

    • 46
    • 69

    Rain Likely

    • 42
    • 60

    Partly Sunny

    • 47
    • 67

    Mostly Sunny

Today 4 Mar Northumberland

Mostly cloudy. Areas of fog this morning. A slight chance of rain this afternoon. Not as cool with Highs around 50. North Winds around 5 Mph this Morning, becoming light and variable. Chance of rain 20 percent.

Tonight 4 Mar Northumberland

Cloudy. A chance of rain in the Evening, then rain likely after midnight. Patchy fog in the Evening, then Areas of fog after midnight. Mild. Lows in the lower 40s. Light and variable Winds. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Herndon Temperature Statistics

March Temperature

Selinsgrove Penn Valley Airport (7.5 miles)

  • Lowest 2 March, 2026

    19.9 °F

  • Average March

    30.5 °F

  • Highest 1 March, 2026

    41 °F

Climate (2021–Present)

Selinsgrove Penn Valley Airport (7.5 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    63 °F
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