Allison, IL 14 Day Weather - WeatherWorld.com
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Allison, IL Weather Forecast


Allison, IL Weather Forecast Dated: 921 PM Sat Sep 05 2026
Expect a hot stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate. Isolated storms at times.
Saturday, September 5, 2026
Mid-Morning
89°F 32°C
Sunny
Mid-Afternoon
101°F 39°C
Sunny
Early-Evening
92°F 34°C
Overcast
Scorching heat reaching 101°F 39°C, feeling like 111°F 44°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the WNW to the SSW at 12 mph 19 km/h. Gusts up to 20 mph 31 km/h.
Sunday, September 6, 2026
Mid-Morning
71°F 21°C
Sunny
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
77°F 25°C
Sunny
Balmy with temperatures reaching 88°F 31°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds switching from the NE to the ENE at 12 mph 20 km/h. Gusts up to 21 mph 34 km/h.
Monday, September 7, 2026
Mid-Morning
69°F 20°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
80°F 27°C
Cloudy
Sizzling hot with 90°F 32°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds moving from the ENE to the NE at 8 mph 12 km/h.
Tuesday, September 8, 2026
Mid-Morning
77°F 25°C
Cloudy
Mid-Afternoon
96°F 36°C
Partly Cloudy
Early-Evening
89°F 32°C
Sunny
Hot temperatures near 96°F 36°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the SSW to the SSE at 12 mph 19 km/h. Gusts up to 23 mph 37 km/h.
Wednesday, September 9, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
101°F 38°C
Scattered Showers
Early-Evening
85°F 30°C
Scattered Showers
Scorching hot near 101°F 38°C, scattered downpours possible, with steady humidity and barometric pressure falling. Winds shifting from the SW to the NNW at 17 mph 27 km/h. Gusts up to 25 mph 41 km/h.
Thursday, September 10, 2026
Mid-Morning
71°F 22°C
Light Showers
Mid-Afternoon
77°F 25°C
Light Showers
Early-Evening
75°F 24°C
Light Showers
Pleasant near 77°F 25°C, on-and-off showers throughout the day, with steady humidity and steady pressure. Winds turning from the W to the SE at 7 mph 11 km/h.
Friday, September 11, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
85°F 29°C
Partly Cloudy
Early-Evening
77°F 25°C
Sunny
Balmy with temperatures reaching 85°F 29°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds switching from the ENE to the E at 8 mph 13 km/h.
Saturday, September 12, 2026
Mid-Morning
74°F 23°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
83°F 28°C
Sunny
Sizzling hot with 90°F 32°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the SSE to the SE at 8 mph 13 km/h.
Sunday, September 13, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
91°F 33°C
Overcast
Early-Evening
84°F 29°C
Overcast
Very hot with a high of 91°F 33°C, feeling closer to 94°F 35°C in the humidity, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the SSW to the S at 6 mph 10 km/h.
Monday, September 14, 2026
Mid-Morning
80°F 26°C
Sunny
Mid-Afternoon
92°F 33°C
Partly Cloudy
Early-Evening
84°F 29°C
Overcast
Sizzling hot near 92°F 33°C with a heat index reaching 96°F 36°C, sunny in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
80°F 26°C
Light Showers
Mid-Afternoon
94°F 34°C
Overcast
Early-Evening
87°F 30°C
Overcast
Hot and sweltering around 94°F 34°C (heat index 97°F 36°C), scattered morning showers before drying out later, with lower humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
86°F 30°C
Cloudy
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
88°F 32°C
Nearby Thunderstorms
Dangerously hot with a high of 102°F 39°C, heavy thunderstorms conditions at times, with steady humidity and barometric pressure falling. Winds shifting from the SW to the SSW at 9 mph 14 km/h.
Thursday, September 17, 2026
Mid-Morning
77°F 25°C
Scattered Showers
Mid-Afternoon
93°F 34°C
Overcast
Early-Evening
89°F 32°C
Overcast
Sizzling hot near 93°F 34°C with a heat index reaching 96°F 36°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds turning from the SW to the S at 8 mph 13 km/h.
Friday, September 18, 2026
Mid-Morning
80°F 27°C
Partly Cloudy
Mid-Afternoon
98°F 37°C
Partly Cloudy
Early-Evening
86°F 30°C
Overcast
Hot temperatures near 98°F 37°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the W to the NE at 13 mph 20 km/h. Gusts up to 23 mph 38 km/h.
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