Merna Weather Forecast

    • 63
    • 81

    Mostly Cloudy

    • 53
    • 83

    Slight Chance Thunderstorms

    • 52
    • 75

    Mostly Sunny

    • 49
    • 71

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

    • 52
    • 75

    Mostly Sunny

Today 22 Aug McLean

Areas of fog in the morning. Partly sunny. Highs in the lower 80s. East Winds around 5 Mph, becoming north in the afternoon.

Tonight 22 Aug McLean

Mostly clear. Areas of fog. Lows around 60. Northeast Winds around 5 Mph.

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Merna Temperature Statistics

August Temperature

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (5 miles)

  • Lowest 3 August, 2025

    57 °F

  • Average August

    75.6 °F

  • Highest 16 August, 2025

    91.9 °F

Climate (2020–Present)

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (5 miles)

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.1 °F
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