Chatham Weather Forecast

    • 62
    • 83

    Mostly Cloudy

    • 61
    • 83

    Slight Chance Thunderstorms

    • 58
    • 83

    Partly Sunny

    • 57
    • 80

    Mostly Cloudy

    • 56
    • 80

    Partly Sunny

    • 55
    • 78

    Mostly Sunny

Today 26 May Sangamon

Mostly cloudy. Highs in the lower 80s. East Winds around 5 Mph.

Tonight 26 May Sangamon

Mostly cloudy. A slight chance of Showers after midnight. Lows in the lower 60s. East Winds around 5 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

    62.4 °F

  • Highest 17 May, 2026

    85.6 °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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