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


Flagg, IL Weather Forecast Dated: 138 AM Sat Sep 05 2026
Expect a very warm period with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Saturday, September 5, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
73°F 23°C
Sunny
Warm and summery around 81°F 27°C (feels like 84°F 29°C), sunny throughout the day, with steady humidity and steady pressure. Winds turning from the NE to the ENE at 10 mph 16 km/h.
Sunday, September 6, 2026
Mid-Morning
69°F 21°C
Sunny
Mid-Afternoon
77°F 25°C
Overcast
Early-Evening
69°F 20°C
Overcast
Comfortable with temperatures reaching 77°F 25°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the ESE to the E at 10 mph 15 km/h.
Monday, September 7, 2026
Mid-Morning
65°F 19°C
Overcast
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
70°F 21°C
Sunny
Enjoyable around 75°F 24°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds SE at 10 mph 15 km/h.
Tuesday, September 8, 2026
Mid-Morning
67°F 20°C
Cloudy
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
82°F 28°C
Overcast
Warm temperatures up to 80°F 27°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds swinging from the S to the SSE at 14 mph 23 km/h. Gusts up to 34 mph 54 km/h.
Wednesday, September 9, 2026
Mid-Morning
72°F 22°C
Scattered Showers
Mid-Afternoon
79°F 26°C
Overcast
Early-Evening
73°F 23°C
Cloudy
Mild with a high of 79°F 26°C, scattered downpours possible, with lower humidity and steady pressure. Winds shifting from the NW to the WNW at 9 mph 15 km/h. Gusts up to 20 mph 33 km/h.
Thursday, September 10, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
73°F 23°C
Partly Cloudy
Early-Evening
68°F 20°C
Partly Cloudy
Pleasant near 73°F 23°C, partly cloudy through the afternoon, turning overcast this evening, with increasing humidity and steady pressure.
Friday, September 11, 2026
Mid-Morning
64°F 18°C
Partly Cloudy
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
69°F 21°C
Overcast
Comfortable with temperatures reaching 72°F 22°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds SE at 9 mph 15 km/h.
Saturday, September 12, 2026
Mid-Morning
64°F 18°C
Light Showers
Mid-Afternoon
80°F 27°C
Scattered Showers
Early-Evening
82°F 28°C
Overcast
Quite warm reaching 80°F 27°C, feeling like 83°F 29°C during peak afternoon, scattered downpours possible, with lower humidity and barometric pressure falling. Winds out of the S at 17 mph 28 km/h. Gusts up to 37 mph 60 km/h.
Sunday, September 13, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
92°F 33°C
Sunny
Early-Evening
89°F 32°C
Sunny
Very hot with a high of 92°F 33°C, feeling closer to 96°F 36°C in the humidity, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds moving from the SSW to the SSE at 11 mph 18 km/h. Gusts up to 23 mph 37 km/h.
Monday, September 14, 2026
Mid-Morning
80°F 27°C
Sunny
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
86°F 30°C
Sunny
Sizzling hot near 91°F 33°C with a heat index reaching 95°F 35°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the SSW to the SSE at 15 mph 24 km/h. Gusts up to 27 mph 43 km/h.
Tuesday, September 15, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
83°F 28°C
Cloudy
Warm and summery near 89°F 32°C, partly cloudy through the afternoon, turning sunny this evening, with steady humidity and steady pressure. Winds shifting from the SSW to the SSE at 14 mph 23 km/h. Gusts up to 31 mph 50 km/h.
Wednesday, September 16, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
84°F 29°C
Overcast
Balmy with temperatures reaching 88°F 31°C, sunny in the morning, becoming cloudy through the afternoon and evening, with steady humidity and barometric pressure falling. Winds turning from the S to the SSE at 11 mph 17 km/h. Gusts up to 21 mph 33 km/h.
Thursday, September 17, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
69°F 21°C
Sunny
Enjoyable around 74°F 23°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds NW at 14 mph 23 km/h. Gusts up to 22 mph 35 km/h.
Friday, September 18, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
62°F 17°C
Partly Cloudy
Early-Evening
55°F 13°C
Sunny
Mildly cool near 62°F 17°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds moving from the N to the NNE at 9 mph 14 km/h.
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