Chatham Weather Forecast

    • 61
    • 84

    Becoming Sunny

    • 59
    • 81

    Mostly Sunny

    • 63
    • 80

    Mostly Cloudy

    • 66
    • 83

    Mostly Cloudy

    • 65
    • 86

    Slight Chance Thunderstorms

    • 65
    • 86

    Slight Chance Thunderstorms

Today 22 Aug Sangamon

Sunny. Highs in the mid 80s. Northwest Winds 5 to 10 Mph.

Tonight 22 Aug Sangamon

Mostly clear. Lows in the lower 60s. Northwest Winds 5 to 10 Mph.

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Chatham Temperature Statistics

August Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 3 August, 2026

    60.7 °F

  • Average August

    77.3 °F

  • Highest 11 August, 2026

    92.6 °F

Climate (2021–2026)

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

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  • Average Low 2021–2026

    45 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.6 °F
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