Merna Weather Forecast

    • 62
    • 79

    Increasing Clouds

    • 62
    • 84

    Chance Thunderstorms

    • 60
    • 81

    Mostly Sunny

    • 60
    • 81

    Mostly Sunny

    • 66
    • 82

    Partly Sunny

    • 71
    • 87

    Partly Sunny

Today 25 Aug McLean

Patchy fog this morning. Sunny. Highs in the upper 70s. Southeast Winds around 5 Mph.

Tonight 25 Aug McLean

Partly cloudy. Lows in the lower 60s. South 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 21 August, 2026

    59 °F

  • Average August

    74 °F

  • Highest 9 August, 2026

    88 °F

Climate (2021–2026)

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