Line Mountain Weather Forecast

    • 54
    • 73

    Becoming Sunny

    • 56
    • 79

    Mostly Sunny

    • 60
    • 82

    Rain Showers

    • 62
    • 80

    Rain Showers Likely

    • 59
    • 77

    Chance Thunderstorms

    • 59
    • 84

    Partly Sunny

    • 63
    • 87

    Partly Sunny

Today 23 Jun Northumberland

Mostly cloudy. Near steady temperature in the lower 70s. North Winds 10 to 15 Mph.

Tonight 23 Jun Northumberland

Partly cloudy this Evening, then becoming mostly clear. Lows in the mid 50s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Line Mountain Temperature Statistics

June Temperature

Selinsgrove Penn Valley Airport (17.4 miles)

  • Lowest 3 June, 2026

    44.1 °F

  • Average June

    69 °F

  • Highest 11 June, 2026

    91 °F

Climate (2021–2026)

Selinsgrove Penn Valley Airport (17.4 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    63.1 °F
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