Clay School, IL 14 Day Weather
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Clay School, IL Weather Forecast


Clay School, IL Weather Forecast Dated: 415 AM Wed Sep 09 2026
Expect a hot stretch with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate. Isolated storms at times.
Wednesday, September 9, 2026
Mid-Morning
83°F 28°C
Partly Cloudy
Mid-Afternoon
98°F 37°C
Sunny
Early-Evening
76°F 24°C
Light Showers
Sizzling hot near 98°F 37°C with a heat index reaching 102°F 39°C, drier conditions through late afternoon before showers move in, with increasing humidity and steady pressure. Winds turning from the S to the NE at 12 mph 18 km/h.
Thursday, September 10, 2026
Mid-Morning
73°F 23°C
Cloudy
Mid-Afternoon
73°F 23°C
Heavy Rain Showers
Early-Evening
74°F 24°C
Light Showers
Comfortable with temperatures reaching 73°F 23°C, clouds and showers taking over for the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the WSW at 9 mph 14 km/h.
Friday, September 11, 2026
Mid-Morning
69°F 20°C
Overcast
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
80°F 27°C
Partly Cloudy
Very warm near 86°F 30°C, though humidity makes it feel like 89°F 31°C, overcast in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling.
Saturday, September 12, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
82°F 28°C
Overcast
Early-Evening
80°F 27°C
Overcast
Warm and summery around 82°F 28°C (feels like 85°F 29°C), sunny in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
92°F 33°C
Sunny
Early-Evening
85°F 30°C
Overcast
Very hot with a high of 92°F 33°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds moving from the SW to the SSW at 6 mph 10 km/h.
Monday, September 14, 2026
Mid-Morning
83°F 28°C
Overcast
Mid-Afternoon
99°F 37°C
Sunny
Early-Evening
93°F 34°C
Sunny
Very hot with temperatures reaching 99°F 37°C, partly cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure. Winds out of the WSW at 12 mph 20 km/h.
Tuesday, September 15, 2026
Mid-Morning
78°F 26°C
Light Showers
Mid-Afternoon
86°F 30°C
Scattered Showers
Early-Evening
79°F 26°C
Overcast
Warm and summery around 86°F 30°C (feels like 90°F 32°C), periods of heavy rain and gusty conditions, with lower humidity and steady pressure. A stray shower or storm late in the day. Winds shifting from the WNW to the NNE at 9 mph 15 km/h.
Wednesday, September 16, 2026
Mid-Morning
69°F 20°C
Sunny
Mid-Afternoon
85°F 29°C
Sunny
Early-Evening
78°F 26°C
Sunny
Quite warm around 85°F 29°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the ENE to the E at 9 mph 14 km/h.
Thursday, September 17, 2026
Mid-Morning
76°F 24°C
Sunny
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
91°F 32°C
Sunny
Hot temperatures near 96°F 36°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds switching from the SSE to the SE at 8 mph 13 km/h.
Friday, September 18, 2026
Mid-Morning
88°F 31°C
Sunny
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
97°F 36°C
Cloudy
Sweltering heat reaching 102°F 39°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds moving from the SW to the WSW at 8 mph 13 km/h.
Saturday, September 19, 2026
Mid-Morning
86°F 30°C
Scattered Showers
Mid-Afternoon
101°F 39°C
Sunny
Early-Evening
94°F 34°C
Overcast
Dangerously hot temperatures around 101°F 39°C, scattered downpours possible, with lower humidity and barometric pressure falling. Winds swinging from the NW to the ESE at 8 mph 13 km/h.
Sunday, September 20, 2026
Mid-Morning
87°F 30°C
Sunny
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
94°F 35°C
Sunny
Dangerously hot with a high of 102°F 39°C, sunny throughout the day, with lower humidity and steady pressure. Winds shifting from the S to the SSW at 9 mph 14 km/h.
Monday, September 21, 2026
Mid-Morning
86°F 30°C
Sunny
Mid-Afternoon
91°F 33°C
Overcast
Early-Evening
74°F 24°C
Overcast
Sizzling hot with 91°F 33°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and barometric pressure rising. Winds turning from the WSW to the ESE at 12 mph 19 km/h. Gusts up to 23 mph 37 km/h.
Tuesday, September 22, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
76°F 25°C
Overcast
Early-Evening
64°F 18°C
Scattered Showers
Mild temperatures up to 76°F 25°C, scattered downpours possible, with steady humidity and steady pressure. Winds NE at 10 mph 17 km/h. Gusts up to 21 mph 34 km/h.
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