Arlington Heights Weather Forecast

    • 50
    • 72

    Partly Sunny

    • 54
    • 72

    Partly Sunny

    • 61
    • 75

    Chance Rain Showers

    • 66
    • 72

    Rain Showers Likely

    • 56
    • 72

    Chance Rain Showers

    • 51
    • 65

    Chance Rain Showers

    • 53
    • 64

    Mostly Cloudy

Today 27 Sep Northern Cook

Partly cloudy. Highs in the lower 70s Inland, but only in the upper 60s near the lake. Temperature falling into the mid 60s in the afternoon. Northeast Winds around 5 Mph.

Tonight 27 Sep Northern Cook

Partly cloudy. Patchy fog late. Lows in the lower 50s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Arlington Heights Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (4.3 miles)

  • Lowest 14 September, 2026

    50.6 °F

  • Average September

    70.6 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (4.3 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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