Chatham Weather Forecast

    • 56
    • 68

    Slight Chance Rain Showers

    • 59
    • 78

    Chance Rain Showers

    • 57
    • 80

    Chance Rain Showers

    • 61
    • 82

    Mostly Cloudy

    • 64
    • 84

    Chance Thunderstorms

    • 65
    • 82

    Chance Thunderstorms

Today 22 May Sangamon

Cloudy. Highs in the upper 60s. East Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 22 May Sangamon

Cloudy with a 20 percent chance of Showers. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.

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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

    61.5 °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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