Chatham Weather Forecast

    • 57
    • 84

    Becoming Sunny

    • 55
    • 81

    Partly Sunny

    • 58
    • 80

    Partly Sunny

    • 55
    • 79

    Mostly Cloudy

    • 56
    • 79

    Partly Sunny

    • 57
    • 76

    Partly Sunny

    • 51
    • 78

    Chance Rain Showers

Today 28 Aug Sangamon

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

Tonight 28 Aug Sangamon

Mostly clear. Lows in the upper 50s. Northwest Winds around 5 Mph, becoming northeast after midnight.

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Chatham Temperature Statistics

August Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 24 August, 2025

    53.1 °F

  • Average August

    76 °F

  • Highest 16 August, 2025

    95.6 °F

Climate (2020–Present)

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

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  • Average Low 2020–2025

    44.9 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    65 °F
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