Bloomington Weather Forecast

    • 63
    • 87

    Chance Thunderstorms

    • 64
    • 84

    Chance Thunderstorms

    • 63
    • 81

    Rain Showers Likely

    • 63
    • 81

    Chance Thunderstorms

    • 61
    • 78

    Chance Rain Showers

    • 59
    • 77

    Slight Chance Thunderstorms

Today 19 Sep McLean

Partly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the upper 80s. South Winds around 5 Mph. Chance of rain 20 percent.

Tonight 19 Sep McLean

Partly cloudy. Lows in the lower 60s. South Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Bloomington Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2025

    45 °F

  • Average September

    67 °F

  • Highest 13 September, 2025

    93.9 °F

Climate (2020–Present)

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

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

  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.1 °F
Get WillyWeather+ to remove ads