Halfway Lake Weather Forecast

    • 68
    • 89

    Slight Chance Thunderstorms

    • 46
    • 82

    Rain Showers

    • 44
    • 63

    Mostly Cloudy

    • 46
    • 63

    Rain Showers

    • 50
    • 60

    Rain Showers

    • 53
    • 68

    Chance Rain Showers

Today 19 May Union

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the upper 80s. West Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 19 May Union

Mostly cloudy. Near steady temperature in the upper 60s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Halfway Lake Temperature Statistics

May Temperature

Selinsgrove Penn Valley Airport (20.5 miles)

  • Lowest 12 May, 2026

    32 °F

  • Average May

    54.2 °F

  • Highest 5 May, 2026

    80.1 °F

Climate (2021–Present)

Selinsgrove Penn Valley Airport (20.5 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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