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Summit-Argo, IL 14 Day Weather - WeatherWorld.com
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Summit-Argo, IL Weather Forecast
Summit-Argo, IL Weather Forecast Dated: 1105 AM Fri Sep 04 2026
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Friday, September 4, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
98°F 37°C
Overcast
Early-Evening
88°F 31°C
Sunny
Sizzling hot near 98°F 37°C with a heat index reaching 106°F 41°C, sunny in the morning, overcast in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds out of the WSW at 10 mph 15 km/h.
Saturday, September 5, 2026
Mid-Morning
75°F 24°C
Partly Cloudy
Mid-Afternoon
76°F 24°C
Scattered Showers
Early-Evening
72°F 22°C
Partly Cloudy
Comfortable with temperatures reaching 76°F 24°C, scattered downpours possible, with lower humidity and steady pressure. Winds blowing from the NNE at 9 mph 15 km/h.
Sunday, September 6, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
77°F 25°C
Overcast
Early-Evening
72°F 22°C
Overcast
Enjoyable around 77°F 25°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the ENE to the NE at 7 mph 12 km/h.
Monday, September 7, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
72°F 22°C
Overcast
Mild temperatures up to 79°F 26°C, sunny through the afternoon, turning overcast this evening, with steady humidity and steady pressure. Winds swinging from the E to the ENE at 6 mph 10 km/h.
Tuesday, September 8, 2026
Mid-Morning
70°F 21°C
Overcast
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
85°F 29°C
Sunny
Very warm with a high of 87°F 31°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds shifting from the SE to the S at 11 mph 17 km/h. Gusts up to 27 mph 42 km/h.
Wednesday, September 9, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
85°F 29°C
Cloudy
Early-Evening
77°F 25°C
Overcast
Warm and summery near 85°F 29°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds turning from the W to the WNW at 10 mph 16 km/h. Gusts up to 21 mph 34 km/h.
Thursday, September 10, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
71°F 22°C
Overcast
Early-Evening
66°F 19°C
Overcast
Comfortable with temperatures reaching 71°F 22°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the ESE to the ENE at 6 mph 10 km/h.
Friday, September 11, 2026
Mid-Morning
60°F 16°C
Light Showers
Mid-Afternoon
68°F 20°C
Scattered Showers
Early-Evening
65°F 18°C
Overcast
Enjoyable around 68°F 20°C, scattered downpours possible, with lower humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
70°F 22°C
Cloudy
Mild temperatures up to 73°F 23°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the SE to the S at 7 mph 11 km/h.
Sunday, September 13, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
73°F 23°C
Cloudy
Early-Evening
66°F 19°C
Scattered Showers
Mild with a high of 73°F 23°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds swinging from the WSW to the N at 9 mph 14 km/h.
Monday, September 14, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
62°F 17°C
Sunny
Pleasant near 68°F 20°C, cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds out of the NE at 8 mph 13 km/h.
Tuesday, September 15, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
67°F 20°C
Partly Cloudy
Comfortable with temperatures reaching 72°F 22°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and barometric pressure falling. Winds turning from the SSE to the S at 11 mph 17 km/h. Gusts up to 23 mph 37 km/h.
Wednesday, September 16, 2026
Mid-Morning
76°F 25°C
Partly Cloudy
Mid-Afternoon
94°F 35°C
Scattered Showers
Early-Evening
91°F 33°C
Sunny
Sizzling hot near 94°F 35°C with a heat index reaching 97°F 36°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds switching from the SSW to the S at 9 mph 15 km/h. Gusts up to 24 mph 39 km/h.
Thursday, September 17, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
88°F 31°C
Partly Cloudy
Early-Evening
79°F 26°C
Partly Cloudy
Quite warm reaching 88°F 31°C, feeling like 92°F 33°C during peak afternoon, partly cloudy through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure. Winds moving from the SW to the SE at 6 mph 10 km/h.
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