Janesville Weather Forecast

    • 70
    • 89

    Mostly Sunny

    • 71
    • 91

    Mostly Sunny

    • 72
    • 91

    Mostly Sunny

    • 69
    • 90

    Chance Thunderstorms

    • 68
    • 85

    Chance Thunderstorms

    • 68
    • 86

    Chance Thunderstorms

Today 3 Jul Cumberland

Sunny. Highs in the upper 80s. West Winds around 5 Mph.

Tonight 3 Jul Cumberland

Mostly clear. Lows around 70. Light and variable Winds.

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Janesville Temperature Statistics

July Temperature

Mattoon / Charleston, Coles County Memorial Airport (6.8 miles)

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  • Average July

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Climate (2020–Present)

Mattoon / Charleston, Coles County Memorial Airport (6.8 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    55 °F

  • Average High 2020–2025

    64.4 °F
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