Chatham Weather Forecast

    • 50
    • 61

    Chance Rain

    • 57
    • 77

    Rain

    • 36
    • 63

    Chance Rain

    • 45
    • 62

    Mostly Sunny

    • 57
    • 74

    Mostly Sunny

    • 47
    • 74

    Rain

Today 5 Mar Sangamon

Cloudy. A chance of Showers this morning. Areas of dense fog this morning. Highs in the lower 60s. West Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 5 Mar Sangamon

Mostly cloudy. Widespread fog in the Evening, then Areas of fog after midnight. A chance of Showers and Thunderstorms after midnight. Lows around 50. Temperature rising into the mid 50s after midnight. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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Chatham Temperature Statistics

March Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 1 March, 2026

    21.9 °F

  • Average March

    36.3 °F

  • Highest 3 March, 2026

    46 °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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