Chatham Weather Forecast

    • 68
    • 87

    Thunderstorms Likely

    • 67
    • 84

    Chance Thunderstorms

    • 65
    • 84

    Chance Rain Showers

    • 67
    • 88

    Sunny

    • 69
    • 88

    Mostly Sunny

    • 71
    • 89

    Mostly Sunny

    • 70
    • 89

    Mostly Sunny

Today 10 Jul Sangamon

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the mid 80s. South Winds around 5 Mph. Chance of rain 30 percent.

Tonight 10 Jul Sangamon

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then Showers and Thunderstorms likely after midnight. Humid with Lows in the upper 60s. North Winds around 5 Mph, becoming southeast around 5 Mph after midnight. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chatham Temperature Statistics

July Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 8 July, 2026

    66 °F

  • Average July

    79.7 °F

  • Highest 2 July, 2026

    92.6 °F

Climate (2021–2026)

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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