Dayton Weather Forecast
- 43
- 60
Rain Showers
- 46
- 67
Partly Sunny
- 47
- 68
Partly Sunny
- 46
- 67
Slight Chance Rain Showers
- 51
- 69
Chance Rain Showers
- 50
- 68
Chance Rain Showers
- 51
- 71
Partly Sunny
Today 22 May La Salle
Mostly cloudy. Isolated Showers late in the Morning, then scattered Showers in the afternoon. Highs around 60. Northwest Winds 10 to 15 Mph. Chance of precipitation 40 percent.
Tonight 22 May La Salle
Partly cloudy in the evening then clearing. A slight chance of Showers early in the evening. Lows in the lower 40s. Northwest Winds 5 to 10 Mph, becoming west after midnight. Chance of precipitation 20 percent.
Dayton Temperature Statistics
May Temperature
Illinois Valley Regional Airport (18 miles)
Lowest 9 May, 2025
38.3 °FAverage May
62.5 °FHighest 15 May, 2025
97.5 °F
Climate (2020–Present)
Illinois Valley Regional Airport (18 miles)
Average Low 2020–2025
43.2 °FAverage 2020–2025
52.6 °FAverage High 2020–2025
62.1 °F