Chatham Weather Forecast

    • 1
    • 17

    Slight Chance Snow

    • 2
    • 16

    Partly Sunny

    • 1
    • 17

    Partly Sunny

    • 13
    • 23

    Mostly Cloudy

    • 16
    • 31

    Mostly Cloudy

    • 23
    • 32

    Mostly Cloudy

Today 29 Jan Sangamon

Mostly cloudy. A chance of Flurries in the afternoon. Highs around 17. Northeast Winds around 5 Mph.

Tonight 29 Jan Sangamon

Mostly cloudy. Cold with Lows around 3 above. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chatham Temperature Statistics

January Temperature

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

  • Lowest 26 January, 2026

    -11 °F

  • Average January

    28.7 °F

  • Highest 8 January, 2026

    65.6 °F

Climate (2021–Present)

Springfield - Abraham Lincoln Capital Airport (11.2 miles)

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  • Average Low 2021–2026

    44.8 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    65.1 °F
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