Bloomington Weather Forecast

    • 24
    • 37

    Increasing Clouds

    • 38
    • 44

    Mostly Cloudy

    • 34
    • 50

    Partly Sunny

    • 51
    • 55

    Chance Rain

    • 41
    • 61

    Mostly Cloudy

    • 33
    • 49

    Mostly Cloudy

Today 21 Dec McLean

Sunny. Highs in the mid 30s. North Winds around 5 Mph, becoming south this afternoon.

Tonight 21 Dec McLean

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the mid 20s. Temperature rising into the upper 20s after midnight. South Winds 5 to 10 Mph.

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Bloomington Temperature Statistics

December Temperature

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

  • Lowest 14 December, 2025

    -9 °F

  • Average December

    22.8 °F

  • Highest 18 December, 2025

    53.1 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.2 °F
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