Sullivan Weather Forecast

    • 63
    • 82

    Increasing Clouds

    • 69
    • 83

    Mostly Cloudy

    • 64
    • 86

    Rain Showers Likely

    • 54
    • 72

    Chance Rain Showers

    • 55
    • 68

    Slight Chance Rain Showers

    • 48
    • 70

    Mostly Sunny

Today 29 Sep Moultrie

Sunny. Near steady temperature in the lower 80s. South Winds around 5 Mph.

Tonight 29 Sep Moultrie

Partly cloudy in the Evening, then becoming mostly cloudy. Not as cool with Lows in the lower 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sullivan Temperature Statistics

September Temperature

Mattoon / Charleston, Coles County Memorial Airport (19.3 miles)

  • Lowest 27 September, 2026

    46.9 °F

  • Average September

    75.8 °F

  • Highest 2 September, 2026

    97.6 °F

Climate (2021–2026)

Mattoon / Charleston, Coles County Memorial Airport (19.3 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.1 °F
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