Plum Island Weather Forecast

    • 39
    • 53

    Rain

    • 27
    • 42

    Rain

    • 36
    • 42

    Mostly Cloudy

    • 33
    • 57

    Mostly Cloudy

    • 22
    • 42

    Mostly Cloudy

    • 27
    • 36

    Chance Snow

Today 30 Jan La Salle

Partly cloudy in the Morning, then mostly cloudy with a chance of rain Showers in the afternoon. Record breaking warmth likely. Highs in the lower 50s. South Winds 10 to 20 Mph with Gusts up to 25 Mph. Chance of precipitation 50 percent.

Tonight 30 Jan La Salle

Occasional Showers. Patchy fog. Unseasonably mild. Lows in the upper 30s. Southeast Winds around 5 Mph in the Evening, becoming east after midnight. Chance of precipitation 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Plum Island Temperature Statistics

January Temperature

Illinois Valley Regional Airport (8.1 miles)

  • Lowest 21 January, 2025

    -9.2 °F

  • Average January

    21.2 °F

  • Highest 28 January, 2025

    50.9 °F

Climate (2020–Present)

Illinois Valley Regional Airport (8.1 miles)

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  • Average Low 2020–2025

    43.1 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    61.7 °F
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