Crystal Lake Weather Forecast

    • 56
    • 72

    Mostly Sunny

    • 63
    • 77

    Partly Sunny

    • 67
    • 83

    Mostly Sunny

    • 67
    • 85

    Chance Thunderstorms

    • 67
    • 81

    Chance Thunderstorms

    • 66
    • 79

    Chance Thunderstorms

Today 22 Jul Sullivan

Sunny. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 22 Jul Sullivan

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. Northeast Winds around 5 Mph, becoming southeast after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

July Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 4 July, 2025

    56.6 °F

  • Average July

    76.4 °F

  • Highest 7 July, 2025

    91.7 °F

Climate (2020–Present)

Williamsport - Lycoming County Airport (14.3 miles)

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

  • Average Low 2020–2025

    44 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    63.4 °F
Get WillyWeather+ to remove ads