Chatham Weather Forecast

    • 68
    • 75

    Rain Showers Likely

    • 65
    • 75

    Rain Showers Likely

    • 62
    • 79

    Slight Chance Rain Showers

    • 62
    • 81

    Mostly Sunny

    • 64
    • 83

    Mostly Sunny

    • 67
    • 85

    Partly Sunny

    • 68
    • 86

    Slight Chance Thunderstorms

Today 31 Jul Sangamon

Showers likely with a chance of Thunderstorms. Highs in the upper 70s. South Winds around 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 31 Jul Sangamon

Patchy fog this evening. Mostly cloudy with a chance of Thunderstorms. Showers Likely, mainly this evening. Lows in the upper 60s. Southeast Winds around 15 Mph, becoming south after midnight. Chance of rain 70 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 23 July, 2026

    56.6 °F

  • Average July

    77.6 °F

  • Highest 27 July, 2026

    94.6 °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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