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Riverview Park Alton, IL 14 Day Weather
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Riverview Park Alton, IL Weather Forecast
Riverview Park Alton, IL Weather Forecast Dated: 259 PM Mon Aug 31 2026 (Riverview Park Alton 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
84°F 29°C
Sunny
Mid-Afternoon
98°F 37°C
Overcast
Early-Evening
92°F 34°C
Cloudy
Hot with overcast skies, steady humidity and steady pressure. Winds shifting from SSW to S at 9 mph 14 km/h.
Tuesday, September 1, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
101°F 39°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 9 mph 14 km/h.
Wednesday, September 2, 2026
Mid-Morning
85°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 9 mph 15 km/h.
Thursday, September 3, 2026
Mid-Morning
84°F 29°C
Cloudy
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
94°F 35°C
Sunny
Dangerously hot with partly sunny skies in the morning, then mostly sunny for the afternoon and evening, lower humidity and steady pressure. Winds shifting from WSW to SSE at 5 mph 9 km/h.
Friday, September 4, 2026
Mid-Morning
85°F 29°C
Partly Cloudy
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
94°F 34°C
Partly Cloudy
Dangerously hot with mostly sunny skies in the morning, mostly sunny in the afternoon, and partly sunny in the evening, lower humidity and barometric pressure falling. Winds shifting from SW to ESE at 8 mph 13 km/h.
Saturday, September 5, 2026
Mid-Morning
84°F 29°C
Partly Cloudy
Mid-Afternoon
97°F 36°C
Cloudy
Early-Evening
88°F 32°C
Sunny
Hot with mostly cloudy skies, steady humidity and steady pressure.
Sunday, September 6, 2026
Mid-Morning
72°F 22°C
Light Showers
Mid-Afternoon
77°F 25°C
Light Showers
Early-Evening
73°F 23°C
Light Showers
Warm with a mix of sun and clouds, steady humidity and steady pressure. Winds shifting from E to ESE at 8 mph 13 km/h.
Monday, September 7, 2026
Mid-Morning
69°F 21°C
Light Showers
Mid-Afternoon
86°F 30°C
Scattered Showers
Early-Evening
79°F 26°C
Scattered Showers
Very warm with a mix of sun and clouds, steady humidity and barometric pressure falling. A few spotty showers; otherwise dry. Winds shifting from SE to ESE at 9 mph 14 km/h.
Tuesday, September 8, 2026
Mid-Morning
76°F 25°C
Light Fog
Mid-Afternoon
88°F 31°C
Overcast
Early-Evening
83°F 29°C
Partly Cloudy
Very warm with overcast skies, lower humidity and steady pressure. Winds shifting from SSE to E at 10 mph 16 km/h.
Wednesday, September 9, 2026
Mid-Morning
76°F 24°C
Overcast
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
80°F 27°C
Sunny
Hot with mostly sunny skies in the morning, then mostly sunny for the afternoon and evening, steady humidity and steady pressure. Winds shifting from SSE to NE at 11 mph 18 km/h.
Thursday, September 10, 2026
Mid-Morning
78°F 25°C
Fog
Mid-Afternoon
93°F 34°C
Sunny
Early-Evening
87°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
93°F 34°C
Sunny
Early-Evening
87°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. Winds increasing from the ENE at 3 mph 5 km/h to ENE at 11 mph 17 km/h.
Saturday, September 12, 2026
Mid-Morning
78°F 25°C
Partly Cloudy
Mid-Afternoon
90°F 32°C
Partly Cloudy
Early-Evening
85°F 30°C
Cloudy
Hot with mostly sunny skies in the morning, partly sunny in the afternoon, and mostly cloudy in the evening, lower humidity and steady pressure. Winds E at 9 mph 15 km/h.
Sunday, September 13, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
90°F 32°C
Partly Cloudy
Early-Evening
86°F 30°C
Scattered Showers
Hot with mostly sunny skies in the morning, mostly cloudy in the afternoon, and partly sunny in the evening, lower humidity and steady pressure.
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