Janesville Weather Forecast

    • 54
    • 67

    Mostly Cloudy

    • 62
    • 76

    Decreasing Clouds

    • 52
    • 80

    Rain Showers

    • 52
    • 62

    Rain Showers

    • 48
    • 66

    Rain Showers Likely

    • 54
    • 70

    Chance Rain Showers

    • 49
    • 71

    Rain Showers Likely

Today 29 Mar Cumberland

Partly sunny and not as cool. Near steady temperature in the upper 60s. South Winds around 15 Mph with Gusts up to 25 Mph.

Tonight 29 Mar Cumberland

Mostly cloudy. Not as cool with Lows in the mid 50s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Janesville Temperature Statistics

March Temperature

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

  • Lowest 17 March, 2026

    14.6 °F

  • Average March

    49.3 °F

  • Highest 22 March, 2026

    86.6 °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

    55.3 °F

  • Average High 2021–2026

    64.8 °F
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