Round Knob, IL 14 Day Weather - WeatherWorld.com
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Round Knob, IL Weather Forecast


Round Knob, IL Weather Forecast Dated: 1015 PM Wed Sep 09 2026
Expect a very warm period 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
82°F 28°C
Sunny
Mid-Afternoon
96°F 36°C
Partly Cloudy
Early-Evening
89°F 31°C
Partly Cloudy
Sizzling hot near 96°F 36°C with a heat index reaching 105°F 41°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds easing from SW 13 mph 20 km/h to N 5 mph 9 km/h.
Thursday, September 10, 2026
Mid-Morning
75°F 24°C
Scattered Showers
Mid-Afternoon
90°F 32°C
Scattered Showers
Early-Evening
71°F 22°C
Heavy Rain Showers
Hot and sweltering around 90°F 32°C (heat index 93°F 34°C), scattered downpours possible, with increasing humidity and steady pressure. Winds switching from the S to the NE at 8 mph 13 km/h.
Friday, September 11, 2026
Mid-Morning
69°F 20°C
Light Fog
Mid-Afternoon
82°F 28°C
Scattered Showers
Early-Evening
76°F 24°C
Overcast
Very warm near 82°F 28°C, though humidity makes it feel like 85°F 29°C, locally heavy downpours at times, with lower humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
73°F 23°C
Partly Cloudy
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
84°F 29°C
Sunny
Warm and summery around 89°F 32°C (feels like 93°F 34°C), partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
93°F 34°C
Overcast
Early-Evening
86°F 30°C
Cloudy
Hot and sweltering around 93°F 34°C (heat index 97°F 36°C), sunny in the morning, overcast in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure.
Monday, September 14, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
98°F 37°C
Sunny
Early-Evening
88°F 31°C
Overcast
Very hot with a high of 98°F 37°C, feeling closer to 101°F 38°C in the humidity, sunny in the morning, cloudy in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure. Winds moving from the SW to the SSW at 8 mph 13 km/h.
Tuesday, September 15, 2026
Mid-Morning
85°F 29°C
Sunny
Mid-Afternoon
98°F 36°C
Partly Cloudy
Early-Evening
85°F 29°C
Sunny
Sizzling hot near 98°F 36°C with a heat index reaching 102°F 39°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. A stray shower or storm late in the day. Winds swinging from the SW to the WNW at 6 mph 10 km/h.
Wednesday, September 16, 2026
Mid-Morning
71°F 22°C
Light Showers
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
81°F 27°C
Partly Cloudy
Quite warm reaching 87°F 31°C, feeling like 91°F 33°C during peak afternoon, scattered morning showers before drying out later, with lower humidity and steady pressure. Winds blowing from the NNE at 4 mph 7 km/h.
Thursday, September 17, 2026
Mid-Morning
76°F 24°C
Fog
Mid-Afternoon
90°F 32°C
Overcast
Early-Evening
81°F 27°C
Overcast
Very hot with a high of 90°F 32°C, feeling closer to 96°F 35°C in the humidity, cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling.
Friday, September 18, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
72°F 22°C
Partly Cloudy
Early-Evening
66°F 19°C
Partly Cloudy
Mild with a high of 72°F 22°C, cloudy in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds turning from the NW to the ESE at 10 mph 16 km/h.
Saturday, September 19, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
68°F 20°C
Sunny
Pleasant near 75°F 24°C, sunny throughout the day, with lower humidity and steady pressure.
Sunday, September 20, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
69°F 21°C
Sunny
Comfortable with temperatures reaching 77°F 25°C, sunny throughout the day, with lower humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
75°F 24°C
Sunny
Quite warm around 82°F 28°C, sunny through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
73°F 23°C
Cloudy
Mid-Afternoon
85°F 30°C
Sunny
Early-Evening
78°F 25°C
Sunny
Warm temperatures up to 85°F 30°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.
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