Chatham Weather Forecast

    • 32
    • 61

    Sunny

    • 44
    • 62

    Mostly Cloudy

    • 47
    • 58

    Chance Rain Showers

    • 47
    • 60

    Chance Rain Showers

    • 45
    • 59

    Chance Rain Showers

    • 44
    • 61

    Chance Rain Showers

    • 40
    • 57

    Slight Chance Rain Showers

Today 23 Oct Sangamon

Sunny. Near steady temperature in the upper 50s. Northwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 23 Oct Sangamon

Clear. Areas of frost after midnight. Lows in the lower 30s. Northwest Winds around 5 Mph, becoming northeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chatham Temperature Statistics

October Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 20 October, 2025

    39 °F

  • Average October

    64.7 °F

  • Highest 2 October, 2025

    88 °F

Climate (2020–Present)

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    65.1 °F
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