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Spillway Recreation Area, IL 14 Day Weather
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Spillway Recreation Area, IL Weather Forecast
Spillway Recreation Area, IL Weather Forecast Dated: 309 PM Mon Aug 31 2026 (Spillway Recreation Area Time)
Expect a hot stretch with plenty of sunshine and occasional showers over the next two weeks. moderate humidity and no major pressure swings will dominate.
Monday, August 31, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
96°F 35°C
Overcast
Early-Evening
90°F 32°C
Overcast
Hot with overcast skies, lower humidity and steady pressure. Winds shifting from SW to S at 9 mph 14 km/h.
Tuesday, September 1, 2026
Mid-Morning
81°F 27°C
Partly Cloudy
Mid-Afternoon
99°F 37°C
Sunny
Early-Evening
93°F 34°C
Sunny
Hot with partly sunny skies in the morning, then mostly sunny for the afternoon and evening, lower humidity and steady pressure. Winds shifting from SW to S at 9 mph 15 km/h.
Wednesday, September 2, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
95°F 35°C
Sunny
Dangerously hot with mostly sunny skies in the morning, then mostly sunny for the afternoon and evening, lower humidity and steady pressure. Winds shifting from SW to S at 10 mph 17 km/h.
Thursday, September 3, 2026
Mid-Morning
84°F 29°C
Partly Cloudy
Mid-Afternoon
101°F 38°C
Sunny
Early-Evening
94°F 35°C
Partly Cloudy
Dangerously hot with partly sunny skies in the morning, mostly sunny in the afternoon, and partly sunny in the evening, lower humidity and steady pressure. Winds shifting from SW to SE at 8 mph 12 km/h.
Friday, September 4, 2026
Mid-Morning
86°F 30°C
Sunny
Mid-Afternoon
101°F 39°C
Sunny
Early-Evening
92°F 34°C
Sunny
Dangerously hot with mostly sunny skies in the morning, then mostly sunny for the afternoon and evening, steady humidity and barometric pressure falling. Winds shifting from WSW to SSW at 7 mph 12 km/h.
Saturday, September 5, 2026
Mid-Morning
82°F 28°C
Scattered Showers
Mid-Afternoon
95°F 35°C
Overcast
Early-Evening
87°F 31°C
Nearby Thunderstorms
Hot with overcast skies, steady humidity and steady pressure. Winds shifting from NNW to ENE at 12 mph 18 km/h.
Sunday, September 6, 2026
Mid-Morning
73°F 23°C
Scattered Showers
Mid-Afternoon
79°F 26°C
Light Showers
Early-Evening
75°F 24°C
Light Showers
Warm with a mix of sun and clouds, steady humidity and steady pressure. Winds NE at 9 mph 14 km/h.
Monday, September 7, 2026
Mid-Morning
72°F 22°C
Rain Showers
Mid-Afternoon
83°F 28°C
Overcast
Early-Evening
81°F 27°C
Overcast
Very warm with overcast skies, steady humidity and barometric pressure falling. Winds shifting from ESE to E at 9 mph 14 km/h.
Tuesday, September 8, 2026
Mid-Morning
75°F 24°C
Fog
Mid-Afternoon
89°F 32°C
Nearby Thunderstorms
Early-Evening
83°F 29°C
Nearby Thunderstorms
Very warm with cloudy skies, lower humidity and steady pressure. A couple of thunderstorms around. Winds shifting from SSE to E at 12 mph 19 km/h.
Wednesday, September 9, 2026
Mid-Morning
73°F 23°C
Overcast
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
87°F 30°C
Sunny
Hot with a mix of sun and clouds, lower humidity and steady pressure. Winds shifting from S to SE at 10 mph 16 km/h.
Thursday, September 10, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
94°F 35°C
Sunny
Early-Evening
88°F 31°C
Sunny
Hot with mostly sunny skies in the morning, then mostly sunny for the afternoon and evening, lower humidity and steady pressure.
Friday, September 11, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
92°F 34°C
Sunny
Early-Evening
86°F 30°C
Sunny
Hot with mostly sunny skies in the morning, mostly sunny in the afternoon, and partly sunny in the evening, steady humidity and steady pressure. Winds shifting from SSW to SSE at 10 mph 15 km/h.
Saturday, September 12, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
85°F 30°C
Sunny
Hot with mostly sunny skies in the morning, mostly sunny in the afternoon, and partly sunny in the evening, lower humidity and steady pressure. Winds shifting from SE to E at 7 mph 11 km/h.
Sunday, September 13, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
89°F 32°C
Cloudy
Early-Evening
87°F 31°C
Scattered Showers
Very warm with mostly cloudy skies, lower humidity and steady pressure.
Spillway Recreation Area, IL Weather Radar Map
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