Starved Rock State Park Weather Forecast
- 59
- 67
Rain Showers
- 55
- 75
Partly Sunny
- 58
- 79
Slight Chance Thunderstorms
- 63
- 80
Chance Thunderstorms
- 59
- 79
Partly Sunny
- 63
- 79
Chance Thunderstorms
- 69
- 82
Chance Thunderstorms
Today 21 Jun La Salle
A chance of Showers late in the Morning, then Showers and a slight chance of Thunderstorms in the late morning and afternoon. Locally heavy rainfall possible in the afternoon. Breezy. Highs in the upper 60s. Southeast Winds 5 to 10 Mph, increasing to east 15 to 20 Mph with Gusts up to 30 Mph in the afternoon. Chance of precipitation near 100 percent.
Tonight 21 Jun La Salle
Cloudy. Rain early in the Evening, then a chance of Showers after midnight. A slight chance of Showers late. Breezy. Near steady temperature in the upper 50s. Northeast Winds 15 to 20 Mph, Diminishing to 10 to 15 Mph after midnight. Gusts up to 30 Mph. Chance of precipitation 90 percent.
Starved Rock State Park Temperature Statistics
June Temperature
Illinois Valley Regional Airport (7.5 miles)
Lowest 3 June, 2026
51.8 °FAverage June
71.3 °FHighest 6 June, 2026
91.4 °F
Climate (2021–2026)
Illinois Valley Regional Airport (7.5 miles)
Average Low 2021–2026
43.2 °FAverage 2021–2026
52.9 °FAverage High 2021–2026
62.6 °F