Chatham Weather Forecast

    • 18
    • 31

    Increasing Clouds

    • 27
    • 50

    Mostly Cloudy

    • 30
    • 46

    Mostly Cloudy

    • 26
    • 43

    Mostly Sunny

    • 35
    • 58

    Mostly Sunny

    • 30
    • 59

    Partly Sunny

Today 23 Feb Sangamon

Partly sunny this Morning, then clearing. Highs in the lower 30s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Wind chill Values as low as 3 below this morning.

Tonight 23 Feb Sangamon

Mostly clear in the Evening, then becoming mostly cloudy. Lows around 19. West Winds around 5 Mph, becoming south with Gusts up to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chatham Temperature Statistics

February Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 1 February, 2026

    -2.3 °F

  • Average February

    36.2 °F

  • Highest 18 February, 2026

    66.9 °F

Climate (2021–Present)

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

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  • Average Low 2021–2026

    45 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    65.3 °F
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