Chatham Weather Forecast

    • 64
    • 80

    Slight Chance Thunderstorms

    • 67
    • 88

    Breezy

    • 68
    • 86

    Rain Showers

    • 56
    • 86

    Rain Showers

    • 48
    • 69

    Mostly Cloudy

    • 49
    • 69

    Mostly Cloudy

    • 54
    • 73

    Partly Sunny

Today 16 May Sangamon

Mostly cloudy with a chance of Showers and Thunderstorms. Highs around 80. Southwest Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 16 May Sangamon

Mostly cloudy with a slight chance of Thunderstorms. A slight chance of Showers this Evening, then a chance of Showers after midnight. Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 40 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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