Chatham Weather Forecast

    • 73
    • 93

    Chance Thunderstorms

    • 71
    • 91

    Chance Thunderstorms

    • 68
    • 88

    Chance Thunderstorms

    • 66
    • 85

    Slight Chance Thunderstorms

    • 66
    • 85

    Partly Sunny

    • 69
    • 88

    Slight Chance Thunderstorms

Today 3 Jul Sangamon

Mostly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the lower 90s. Southwest Winds around 10 Mph. Chance of rain 30 percent. Heat index Values up to 105.

Tonight 3 Jul Sangamon

Partly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Humid with Lows in the lower 70s. South Winds around 5 Mph. Chance of rain 30 percent.

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Chatham Temperature Statistics

July Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 1 July, 2026

    75 °F

  • Average July

    83.3 °F

  • Highest 1 July, 2026

    90 °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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