Plum Island Weather Forecast
- 28
- 41
Rain
- 34
- 40
Mostly Cloudy
- 33
- 53
Mostly Cloudy
- 25
- 44
Mostly Cloudy
- 30
- 37
Mostly Cloudy
- 33
- 43
Chance Rain
Today 31 Jan La Salle
A slight chance of Thunderstorms in the morning. Periods of Periods of rain. Areas of dense fog in the morning. Patchy fog in the afternoon. Some Thunderstorms may produce heavy rainfall in the morning. Nearly steady Temperatures in the upper 30s. Northeast Winds 10 to 20 Mph. Gusts up to 20 Mph in the Morning, increasing to 30 Mph in the afternoon. Chance of precipitation near 100 percent.
Tonight 31 Jan La Salle
Partly cloudy. Lows in the upper 20s. Northeast Winds 10 to 20 Mph. Gusts up to 30 Mph in the Evening, decreasing to 20 Mph after midnight.
Plum Island Temperature Statistics
January Temperature
Illinois Valley Regional Airport (8.1 miles)
Lowest 21 January, 2025
-9.2 °FAverage January
21.2 °FHighest 28 January, 2025
50.9 °F
Climate (2020–Present)
Illinois Valley Regional Airport (8.1 miles)
Average Low 2020–2025
43.1 °FAverage 2020–2025
52.4 °FAverage High 2020–2025
61.7 °F