Winthrop Harbor Weather Forecast

    • 58
    • 73

    Mostly Sunny

    • 61
    • 79

    Mostly Sunny

    • 62
    • 80

    Mostly Sunny

    • 68
    • 82

    Partly Sunny

    • 71
    • 91

    Partly Sunny

    • 67
    • 88

    Slight Chance Thunderstorms

Today 22 Jul Lake

Mostly sunny in the Morning, then becoming partly cloudy. Highs in the mid 70s. North Winds 5 to 10 Mph.

Tonight 22 Jul Lake

Partly cloudy in the Evening, then becoming clear. Lows in the mid 50s. North Winds around 5 Mph, becoming northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winthrop Harbor Temperature Statistics

July Temperature

Chicago/Waukegan Regional Airport (3.7 miles)

  • Lowest 7 July, 2026

    58.6 °F

  • Average July

    75.6 °F

  • Highest 1 July, 2026

    93.7 °F

Climate (2021–2026)

Chicago/Waukegan Regional Airport (3.7 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    59.8 °F
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