Chatham Weather Forecast

    • 64
    • 80

    Rain Showers Likely

    • 62
    • 81

    Rain Showers Likely

    • 67
    • 88

    Mostly Sunny

    • 68
    • 89

    Thunderstorms Likely

    • 57
    • 80

    Rain Showers Likely

    • 52
    • 70

    Slight Chance Thunderstorms

Today 15 May Sangamon

Sunny. Highs in the upper 70s. South Winds around 15 Mph with Gusts up to 25 Mph.

Tonight 15 May Sangamon

Partly cloudy. A chance of Showers and Thunderstorms after midnight. Not as cool with Lows in the mid 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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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

    58.4 °F

  • Highest 12 May, 2026

    83.6 °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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