Bloomington Weather Forecast

    • 68
    • 82

    Chance Thunderstorms

    • 59
    • 79

    Slight Chance Rain Showers

    • 64
    • 84

    Chance Rain Showers

    • 66
    • 88

    Chance Rain Showers

    • 64
    • 84

    Chance Rain Showers

    • 66
    • 86

    Chance Rain Showers

Today 9 Sep McLean

Partly sunny with a chance of Showers and Thunderstorms. Humid with Highs in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 9 Sep McLean

Partly cloudy and not as cool. Near steady temperature in the lower 70s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Bloomington Temperature Statistics

September Temperature

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (3.7 miles)

  • Lowest 6 September, 2026

    62.1 °F

  • Average September

    81.6 °F

  • Highest 1 September, 2026

    95 °F

Climate (2021–2026)

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (3.7 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    62.7 °F
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