Peru Weather Forecast

    • 60
    • 80

    Becoming Sunny

    • 59
    • 80

    Mostly Sunny

    • 64
    • 82

    Partly Sunny

    • 55
    • 81

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

    • 49
    • 69

    Mostly Sunny

    • 49
    • 71

    Partly Sunny

Today 20 Aug La Salle

Partly cloudy. A slight chance of Showers late in the morning. Highs in the lower 80s. Northeast Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 20 Aug La Salle

Clear through the early Overnight, then becoming partly cloudy. Patchy fog in the late evening and overnight. Lows around 60. Northeast Winds 5 to 10 Mph.

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Peru Temperature Statistics

August Temperature

Illinois Valley Regional Airport (1.9 miles)

  • Lowest 3 August, 2025

    53.6 °F

  • Average August

    74.8 °F

  • Highest 16 August, 2025

    91.4 °F

Climate (2020–Present)

Illinois Valley Regional Airport (1.9 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    62.1 °F
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