Chatham Weather Forecast

    • 74
    • 90

    Thunderstorms

    • 71
    • 92

    Chance Thunderstorms

    • 68
    • 87

    Mostly Sunny

    • 75
    • 91

    Slight Chance Thunderstorms

    • 66
    • 91

    Mostly Sunny

    • 61
    • 82

    Mostly Sunny

    • 63
    • 82

    Partly Sunny

Today 17 Jul Sangamon

Sunny with scattered Showers and Thunderstorms. Near steady temperature in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 102.

Tonight 17 Jul Sangamon

Mostly clear. Scattered Showers and Thunderstorms this evening. Lows in the lower 70s. Southwest Winds 5 to 10 Mph. Chance of rain 40 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 13 July, 2026

    63 °F

  • Average July

    78.5 °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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