Crystal Lake Weather Forecast

    • 73
    • 95

    Increasing Clouds

    • 66
    • 93

    Rain Showers Likely

    • 60
    • 80

    Mostly Sunny

    • 64
    • 83

    Mostly Sunny

    • 64
    • 90

    Mostly Sunny

    • 60
    • 87

    Partly Sunny

Today 7 Sep Adams

Partly cloudy in the morning then becoming mostly sunny. Hot. Highs in the mid 90s. South Winds 10 to 20 Mph with Gusts to around 30 Mph.

Tonight 7 Sep Adams

Mostly clear. Lows around 70. Southeast Winds 10 to 15 Mph.

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Crystal Lake Temperature Statistics

September Temperature

Hastings, Hastings Municipal Airport (9.9 miles)

  • Lowest 1 September, 2026

    69.7 °F

  • Average September

    83.8 °F

  • Highest 2 September, 2026

    97.6 °F

Climate (2021–2026)

Hastings, Hastings Municipal Airport (9.9 miles)

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  • Average Low 2021–2026

    42 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    65.7 °F
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