Crystal Lake Weather Forecast

    • 38
    • 61

    Increasing Clouds

    • 27
    • 57

    Slight Chance Rain

    • 21
    • 40

    Mostly Cloudy

    • 22
    • 51

    Breezy

    • 14
    • 34

    Windy

    • 17
    • 35

    Partly Sunny

Today 12 Jan Brown

Mostly sunny. Highs in the lower 60s. West Winds 10 to 15 Mph.

Tonight 12 Jan Brown

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the upper 30s. West Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

January Temperature

Ainsworth Regional Airport (19.3 miles)

  • Lowest 9 January, 2026

    16.5 °F

  • Average January

    36.6 °F

  • Highest 4 January, 2026

    66.4 °F

Climate (2021–Present)

Ainsworth Regional Airport (19.3 miles)

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  • Average Low 2021–2026

    37.8 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    62 °F
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