Herndon Weather Forecast

    • 61
    • 82

    Increasing Clouds

    • 66
    • 86

    Partly Sunny

    • 70
    • 91

    Mostly Sunny

    • 72
    • 95

    Chance Thunderstorms

    • 71
    • 87

    Rain Showers Likely

    • 69
    • 84

    Rain Showers Likely

    • 69
    • 88

    Chance Rain Showers

Today 22 Jul Northumberland

Sunny. Near steady temperature in the upper 70s. Light and variable Winds.

Tonight 22 Jul Northumberland

Mostly clear this Evening, then becoming partly cloudy. Lows around 60. Light and variable Winds, becoming east around 5 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Herndon Temperature Statistics

July Temperature

Selinsgrove Penn Valley Airport (7.5 miles)

  • Lowest 4 July, 2025

    57.7 °F

  • Average July

    76.3 °F

  • Highest 17 July, 2025

    90.6 °F

Climate (2020–Present)

Selinsgrove Penn Valley Airport (7.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    63.2 °F
Get WillyWeather+ to remove ads