Chatham Weather Forecast

    • 63
    • 81

    Chance Thunderstorms

    • 67
    • 87

    Mostly Sunny

    • 68
    • 88

    Rain Showers Likely

    • 56
    • 85

    Thunderstorms Likely

    • 49
    • 71

    Mostly Cloudy

    • 50
    • 71

    Partly Sunny

Today 16 May Sangamon

Mostly cloudy with a chance of Showers and Thunderstorms. Highs in the lower 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 16 May Sangamon

Mostly cloudy with a slight chance of Thunderstorms. A slight chance of Showers. Lows in the mid 60s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chatham Temperature Statistics

May Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 7 May, 2026

    39.7 °F

  • Average May

    58.4 °F

  • Highest 12 May, 2026

    83.6 °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

    55.5 °F

  • Average High 2021–2026

    65.6 °F
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