Janesville Weather Forecast

    • 37
    • 65

    Mostly Sunny

    • 27
    • 57

    Slight Chance Rain

    • 28
    • 41

    Rain/Snow Likely

    • 31
    • 39

    Rain Likely

    • 37
    • 47

    Rain Likely

    • 49
    • 57

    Rain Likely

Today 27 Feb Cumberland

Sunny. Not as cool with Highs in the mid 60s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 27 Feb Cumberland

Mostly clear. Lows in the upper 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Janesville Temperature Statistics

February Temperature

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

  • Lowest 1 February, 2026

    2.6 °F

  • Average February

    34 °F

  • Highest 18 February, 2026

    70.6 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    64.8 °F
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