Chatham Weather Forecast

    • 65
    • 90

    Increasing Clouds

    • 59
    • 83

    Chance Rain Showers

    • 68
    • 84

    Partly Sunny

    • 68
    • 93

    Partly Sunny

    • 66
    • 89

    Chance Rain Showers

    • 64
    • 84

    Chance Rain Showers

Today 12 Sep Sangamon

Sunny. Highs around 90. West Winds around 5 Mph.

Tonight 12 Sep Sangamon

Mostly clear. Near steady temperature in the upper 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chatham Temperature Statistics

September Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 7 September, 2026

    58.6 °F

  • Average September

    82.1 °F

  • Highest 2 September, 2026

    100.7 °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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