Algonquin Weather Forecast

    • 26
    • 41

    Rain

    • 31
    • 36

    Mostly Cloudy

    • 28
    • 50

    Mostly Cloudy

    • 19
    • 36

    Mostly Cloudy

    • 25
    • 32

    Cloudy

    • 26
    • 40

    Chance Wintry Mix

Today 31 Jan McHenry

Mostly cloudy. Rain, rain Showers with a slight chance of Thunderstorms in the Morning, then a chance of rain in the afternoon. Patchy fog. Highs around 40. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of precipitation 90 percent.

Tonight 31 Jan McHenry

Mostly cloudy. Lows in the mid 20s. Northeast Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Algonquin Temperature Statistics

January Temperature

Chicago / West Chicago, Dupage Airport (18.6 miles)

  • Lowest 21 January, 2025

    -8.2 °F

  • Average January

    20.3 °F

  • Highest 28 January, 2025

    48.9 °F

Climate (2020–Present)

Chicago / West Chicago, Dupage Airport (18.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    61 °F
Get WillyWeather+ to remove ads