Algonquin Weather Forecast

    • 50
    • 67

    Slight Chance Thunderstorms

    • 63
    • 79

    Chance Thunderstorms

    • 43
    • 72

    Slight Chance Thunderstorms

    • 49
    • 59

    Rain Showers Likely

    • 47
    • 66

    Rain Showers Likely

    • 40
    • 64

    Mostly Sunny

Today 27 Apr McHenry

Partly cloudy in the morning then clearing. Highs in the mid 60s. Southeast Winds 5 to 10 Mph, increasing to south 10 to 15 Mph in the afternoon.

Tonight 27 Apr McHenry

Mostly clear in the Evening, then becoming partly cloudy. A slight chance of Showers and Thunderstorms late. Lows around 50. South Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Algonquin Temperature Statistics

April Temperature

Chicago / West Chicago, Dupage Airport (18.6 miles)

  • Lowest 8 April, 2025

    23.8 °F

  • Average April

    49.1 °F

  • Highest 24 April, 2025

    78.1 °F

Climate (2020–Present)

Chicago / West Chicago, Dupage Airport (18.6 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    61.1 °F
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