Chatham Weather Forecast

    • 34
    • 65

    Chance Thunderstorms

    • 25
    • 45

    Partly Sunny

    • 21
    • 42

    Mostly Sunny

    • 18
    • 35

    Partly Sunny

    • 19
    • 35

    Partly Sunny

    • 35
    • 46

    Mostly Cloudy

Today 19 Feb Sangamon

Mostly cloudy. Areas of fog this morning. A chance of Showers and Thunderstorms this Morning, then Showers and Thunderstorms likely this afternoon. Highs in the mid 60s. Southeast Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 19 Feb Sangamon

Partly cloudy with a slight chance of rain Showers in the Evening, then mostly cloudy after midnight. Breezy, cooler with Lows in the mid 30s. Southwest Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 20 percent.

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Chatham Temperature Statistics

February Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 1 February, 2026

    -2.3 °F

  • Average February

    33.2 °F

  • Highest 16 February, 2026

    64 °F

Climate (2021–Present)

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

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  • Average Low 2021–2026

    44.9 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    65.3 °F
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