Streamwood Weather Forecast

    • 59
    • 84

    Mostly Sunny

    • 63
    • 86

    Mostly Sunny

    • 62
    • 84

    Mostly Cloudy

    • 63
    • 80

    Slight Chance Thunderstorms

    • 62
    • 80

    Chance Thunderstorms

    • 61
    • 80

    Chance Rain Showers

Today 17 Sep Northern Cook

Mostly sunny. Highs in the mid 80s Inland, but only in the mid 70s near the lake. Northeast Winds 5 to 10 Mph.

Tonight 17 Sep Northern Cook

Mostly clear. Lows in the lower 60s. East Winds around 5 Mph, becoming south after midnight.

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Streamwood Temperature Statistics

September Temperature

Chicago / West Chicago, Dupage Airport (9.3 miles)

  • Lowest 7 September, 2025

    44.1 °F

  • Average September

    64.6 °F

  • Highest 14 September, 2025

    84.9 °F

Climate (2020–Present)

Chicago / West Chicago, Dupage Airport (9.3 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    61.3 °F
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