Willis, IL 14 Day Weather
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Willis, IL Weather Forecast


Willis, IL Weather Forecast Dated: 813 AM Sat Sep 05 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate. Isolated storms at times.
Saturday, September 5, 2026
Mid-Morning
78°F 25°C
Rain Showers
Mid-Afternoon
77°F 25°C
Scattered Showers
Early-Evening
71°F 22°C
Overcast
Pleasant near 77°F 25°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. A stray shower or storm late in the day. Winds out of the NE at 13 mph 21 km/h. Gusts up to 21 mph 34 km/h.
Sunday, September 6, 2026
Mid-Morning
66°F 19°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
67°F 20°C
Sunny
Comfortable with temperatures reaching 74°F 23°C, sunny throughout the day, with steady humidity and steady pressure. Winds blowing from the ENE at 10 mph 17 km/h.
Monday, September 7, 2026
Mid-Morning
64°F 18°C
Partly Cloudy
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
69°F 21°C
Cloudy
Enjoyable around 75°F 24°C, cloudy in the morning, sunny in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds ESE at 8 mph 13 km/h.
Tuesday, September 8, 2026
Mid-Morning
66°F 19°C
Sunny
Mid-Afternoon
79°F 26°C
Partly Cloudy
Early-Evening
81°F 27°C
Sunny
Mild temperatures up to 79°F 26°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds out of the S at 12 mph 19 km/h. Gusts up to 31 mph 49 km/h.
Wednesday, September 9, 2026
Mid-Morning
71°F 22°C
Scattered Showers
Mid-Afternoon
82°F 28°C
Overcast
Early-Evening
76°F 25°C
Sunny
Very warm with a high of 82°F 28°C, scattered downpours possible, with lower humidity and steady pressure. Winds shifting from the NW to the W at 10 mph 16 km/h. Gusts up to 25 mph 39 km/h.
Thursday, September 10, 2026
Mid-Morning
62°F 16°C
Overcast
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
67°F 20°C
Sunny
Pleasant near 71°F 22°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds turning from the NNW to the ENE at 7 mph 12 km/h.
Friday, September 11, 2026
Mid-Morning
60°F 16°C
Partly Cloudy
Mid-Afternoon
68°F 20°C
Partly Cloudy
Early-Evening
66°F 19°C
Overcast
Comfortable with temperatures reaching 68°F 20°C, overcast throughout the day, with lower humidity and barometric pressure falling. Winds switching from the ESE to the E at 11 mph 17 km/h. Gusts up to 21 mph 33 km/h.
Saturday, September 12, 2026
Mid-Morning
62°F 17°C
Cloudy
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
65°F 19°C
Sunny
Enjoyable around 71°F 22°C, cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the E at 13 mph 21 km/h. Gusts up to 20 mph 32 km/h.
Sunday, September 13, 2026
Mid-Morning
60°F 15°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
70°F 21°C
Sunny
Mild temperatures up to 73°F 23°C, sunny throughout the day, with steady humidity and steady pressure. Winds SE at 12 mph 20 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 14, 2026
Mid-Morning
70°F 21°C
Overcast
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
81°F 27°C
Sunny
Warm and summery around 84°F 29°C (feels like 87°F 31°C), cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds shifting from the SSE to the SSW at 6 mph 10 km/h.
Tuesday, September 15, 2026
Mid-Morning
78°F 25°C
Light Showers
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
82°F 28°C
Sunny
Quite warm reaching 87°F 31°C, feeling like 92°F 34°C during peak afternoon, scattered morning showers before drying out later, with steady humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
79°F 26°C
Overcast
Mid-Afternoon
88°F 31°C
Nearby Thunderstorms
Early-Evening
83°F 28°C
Nearby Thunderstorms
Very warm near 88°F 31°C, though humidity makes it feel like 92°F 33°C, heavy thunderstorms conditions at times, with steady humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
68°F 20°C
Fog
Mid-Afternoon
77°F 25°C
Overcast
Early-Evening
75°F 24°C
Overcast
Enjoyable around 77°F 25°C, overcast through the afternoon, turning partly cloudy this evening, with lower humidity and barometric pressure falling. Winds turning from the NE to the ENE at 8 mph 13 km/h.
Friday, September 18, 2026
Mid-Morning
65°F 18°C
Overcast
Mid-Afternoon
69°F 21°C
Overcast
Early-Evening
64°F 17°C
Overcast
Mild temperatures up to 69°F 21°C, overcast through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds switching from the NE to the ENE at 10 mph 16 km/h.
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