Grimsby Weather Forecast

    • 37
    • 60

    Chance Rain Showers

    • 42
    • 49

    Mostly Cloudy

    • 44
    • 63

    Partly Sunny

    • 40
    • 64

    Mostly Cloudy

    • 46
    • 54

    Mostly Cloudy

    • 50
    • 60

    Rain Likely

Today 31 Jan Jackson

Partly sunny this Morning, then mostly cloudy with a chance of Showers this afternoon. Highs around 60. Southwest Winds 10 to 15 Mph. Chance of rain 30 percent.

Tonight 31 Jan Jackson

Cloudy. A slight chance of Showers in the evening. Lows in the upper 30s. Northwest Winds 5 to 10 Mph, becoming north after midnight. Chance of rain 20 percent.

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Grimsby Temperature Statistics

January Temperature

Southern Illinois Airport (11.2 miles)

  • Lowest 15 January, 2025

    6.9 °F

  • Average January

    27.9 °F

  • Highest 28 January, 2025

    55.9 °F

Climate (2020–Present)

Southern Illinois Airport (11.2 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    68.4 °F
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