Chatham Weather Forecast

    • 37
    • 89

    Thunderstorms

    • 28
    • 50

    Partly Sunny

    • 39
    • 54

    Partly Sunny

    • 51
    • 62

    Slight Chance Thunderstorms

    • 58
    • 76

    Chance Rain Showers

    • 60
    • 79

    Chance Rain Showers

Today 26 Mar Sangamon

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Warmer with Highs in the upper 80s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 26 Mar Sangamon

Partly cloudy with a chance of Showers and Thunderstorms. Not as cool. Near steady temperature in the lower 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chatham Temperature Statistics

March Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 17 March, 2026

    11.6 °F

  • Average March

    48.6 °F

  • Highest 20 March, 2026

    85.6 °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

    65.4 °F
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