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


Stillwell, IL Weather Forecast Dated: 154 AM Tue Sep 15 2026
Expect a mild stretch with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Tuesday, September 15, 2026
Mid-Morning
74°F 24°C
Heavy Rain Showers
Mid-Afternoon
90°F 32°C
Partly Cloudy
Early-Evening
77°F 25°C
Overcast
Very hot with temperatures reaching 90°F 32°C, early showers breaking for a drier afternoon, with steady humidity and steady pressure. Winds turning from the S to the NNW at 9 mph 15 km/h.
Wednesday, September 16, 2026
Mid-Morning
66°F 19°C
Scattered Showers
Mid-Afternoon
79°F 26°C
Partly Cloudy
Early-Evening
79°F 26°C
Sunny
Comfortable with temperatures reaching 79°F 26°C, scattered downpours possible, with lower humidity and steady pressure. Winds switching from the NE to the ESE at 5 mph 9 km/h.
Thursday, September 17, 2026
Mid-Morning
72°F 22°C
Overcast
Mid-Afternoon
85°F 30°C
Overcast
Early-Evening
80°F 27°C
Overcast
Very warm near 85°F 30°C, though humidity makes it feel like 90°F 32°C, overcast throughout the day, with lower humidity and steady pressure.
Friday, September 18, 2026
Mid-Morning
72°F 22°C
Cloudy
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
89°F 32°C
Sunny
Sizzling hot near 91°F 33°C with a heat index reaching 96°F 36°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds moving from the ESE to the SSE at 7 mph 11 km/h.
Saturday, September 19, 2026
Mid-Morning
79°F 26°C
Partly Cloudy
Mid-Afternoon
95°F 35°C
Sunny
Early-Evening
85°F 30°C
Sunny
Very hot with a high of 95°F 35°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the W to the SSW at 8 mph 12 km/h.
Sunday, September 20, 2026
Mid-Morning
75°F 24°C
Scattered Showers
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
79°F 26°C
Overcast
Very warm near 88°F 31°C, though humidity makes it feel like 91°F 33°C, locally heavy downpours at times, with steady humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
67°F 20°C
Light Fog
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
70°F 21°C
Overcast
Comfortable with temperatures reaching 72°F 22°C, overcast throughout the day, with steady humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
64°F 18°C
Fog
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
67°F 20°C
Overcast
Enjoyable around 73°F 23°C, overcast throughout the day, with steady humidity and steady pressure. Winds shifting from the NW to the ESE at 7 mph 11 km/h.
Wednesday, September 23, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
67°F 19°C
Overcast
Mild temperatures up to 70°F 21°C, overcast throughout the day, with steady humidity and steady pressure.
Thursday, September 24, 2026
Mid-Morning
65°F 18°C
Overcast
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
73°F 23°C
Sunny
Very warm with a high of 81°F 27°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds increasing from the WSW at 3 mph 5 km/h to ESE at 11 mph 19 km/h. Gusts up to 23 mph 37 km/h.
Friday, September 25, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
67°F 19°C
Sunny
Early-Evening
60°F 16°C
Sunny
Comfortable at 67°F 19°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the N to the NNE at 9 mph 14 km/h.
Saturday, September 26, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
61°F 17°C
Sunny
Comfortable with temperatures reaching 68°F 20°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the NNE to the NE at 9 mph 14 km/h.
Sunday, September 27, 2026
Mid-Morning
53°F 12°C
Sunny
Mid-Afternoon
67°F 19°C
Sunny
Early-Evening
60°F 16°C
Sunny
Refreshing around 67°F 19°C, sunny throughout the day, with steady humidity and steady pressure. Winds ENE at 10 mph 16 km/h.
Monday, September 28, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
62°F 17°C
Sunny
Mild temperatures up to 71°F 22°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds shifting from the ESE to the NNE at 11 mph 18 km/h. Gusts up to 21 mph 33 km/h.
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