Chatham Weather Forecast

    • 68
    • 87

    Decreasing Clouds

    • 73
    • 92

    Partly Sunny

    • 76
    • 97

    Hot

    • 77
    • 98

    Hot

    • 77
    • 98

    Hot

    • 75
    • 97

    Hot

Today 29 Aug Sangamon

Mostly sunny. Highs in the upper 80s. South Winds 5 to 10 Mph.

Tonight 29 Aug Sangamon

Mostly clear. Near steady temperature in the mid 60s. Southeast Winds around 5 Mph.

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Chatham Temperature Statistics

August Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 24 August, 2026

    54.6 °F

  • Average August

    76 °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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