Crystal Lake Weather Forecast

    • 65
    • 91

    Increasing Clouds

    • 65
    • 90

    Mostly Cloudy

    • 64
    • 91

    Chance Thunderstorms

    • 60
    • 84

    Rain Showers Likely

    • 58
    • 71

    Rain Showers Likely

    • 56
    • 69

    Chance Thunderstorms

Today 9 Aug Brown

Mostly sunny. Highs around 90. Northwest Winds around 10 Mph, becoming northeast in the afternoon.

Tonight 9 Aug Brown

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 60s. East Winds 10 to 15 Mph, Diminishing to up to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

August Temperature

Ainsworth Regional Airport (19.3 miles)

  • Lowest 5 August, 2026

    48.4 °F

  • Average August

    69.4 °F

  • Highest 2 August, 2026

    92.7 °F

Climate (2021–2026)

Ainsworth Regional Airport (19.3 miles)

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  • Average Low 2021–2026

    38 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    62.5 °F
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