Chatham Weather Forecast

    • 45
    • 73

    Sunny

    • 46
    • 77

    Sunny

    • 43
    • 72

    Sunny

    • 49
    • 75

    Sunny

    • 52
    • 80

    Mostly Sunny

    • 54
    • 81

    Mostly Sunny

Today 3 Oct Sangamon

Sunny. Highs in the lower 70s. East Winds around 5 Mph.

Tonight 3 Oct Sangamon

Mostly clear. Lows in the mid 40s. East Winds around 5 Mph, becoming south after midnight.

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Chatham Temperature Statistics

October Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 1 October, 2026

    64 °F

  • Average October

    75.3 °F

  • Highest 1 October, 2026

    84.9 °F

Climate (2021–2026)

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

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  • Average Low 2021–2026

    45.1 °F

  • Average 2021–2026

    55.6 °F

  • Average High 2021–2026

    65.7 °F
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