Shirley Weather Forecast

    • 25
    • 37

    Increasing Clouds

    • 38
    • 44

    Mostly Cloudy

    • 32
    • 51

    Partly Sunny

    • 49
    • 57

    Mostly Cloudy

    • 42
    • 63

    Mostly Cloudy

    • 35
    • 56

    Mostly Cloudy

Today 21 Dec McLean

Sunny, cooler with Highs in the mid 30s. Northwest Winds 5 to 10 Mph, becoming south in the afternoon.

Tonight 21 Dec McLean

Clear. Near steady temperature in the mid 20s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Shirley Temperature Statistics

December Temperature

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (8.7 miles)

  • Lowest 14 December, 2025

    -9 °F

  • Average December

    23 °F

  • Highest 18 December, 2025

    53.1 °F

Climate (2020–Present)

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (8.7 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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