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Bismarck, IL Weather Forecast
Bismarck, IL Weather Forecast Dated: 410 AM Wed Sep 09 2026
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate. A few thunderstorms possible.
Wednesday, September 9, 2026
Mid-Morning
79°F 26°C
Cloudy
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
79°F 26°C
Overcast
Warm and summery around 82°F 28°C (feels like 87°F 31°C), cloudy in the morning, partly cloudy in the afternoon, and overcast this evening, with increasing humidity and steady pressure. Winds out of the WNW at 6 mph 10 km/h.
Thursday, September 10, 2026
Mid-Morning
71°F 22°C
Cloudy
Mid-Afternoon
77°F 25°C
Light Showers
Early-Evening
69°F 20°C
Light Showers
Comfortable with temperatures reaching 77°F 25°C, clouds and showers taking over for the afternoon and evening, with steady humidity and steady pressure. A stray shower or storm late in the day. Winds switching from the WNW to the NNE at 9 mph 15 km/h.
Friday, September 11, 2026
Mid-Morning
65°F 19°C
Sunny
Mid-Afternoon
79°F 26°C
Scattered Showers
Early-Evening
75°F 24°C
Scattered Showers
Enjoyable around 79°F 26°C, locally heavy downpours at times, with steady humidity and barometric pressure falling.
Saturday, September 12, 2026
Mid-Morning
70°F 21°C
Partly Cloudy
Mid-Afternoon
84°F 29°C
Overcast
Early-Evening
79°F 26°C
Overcast
Warm and summery around 84°F 29°C (feels like 87°F 30°C), partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the SSW to the E at 5 mph 8 km/h.
Sunday, September 13, 2026
Mid-Morning
72°F 22°C
Overcast
Mid-Afternoon
82°F 28°C
Overcast
Early-Evening
79°F 26°C
Overcast
Quite warm reaching 82°F 28°C, feeling like 85°F 30°C during peak afternoon, overcast throughout the day, with steady humidity and steady pressure.
Monday, September 14, 2026
Mid-Morning
74°F 23°C
Overcast
Mid-Afternoon
78°F 26°C
Light Showers
Early-Evening
81°F 27°C
Scattered Showers
Pleasant near 78°F 26°C, locally heavy downpours at times, with steady humidity and steady pressure. A stray shower or storm late in the day. Winds swinging from the SSW to the WSW at 8 mph 12 km/h.
Tuesday, September 15, 2026
Mid-Morning
75°F 24°C
Light Showers
Mid-Afternoon
76°F 24°C
Light Showers
Early-Evening
68°F 20°C
Sunny
Comfortable with temperatures reaching 76°F 24°C, intermittent showers through midday, easing by evening, with steady humidity and barometric pressure rising. Winds shifting from the SW to the NNW at 9 mph 15 km/h.
Wednesday, September 16, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
67°F 20°C
Sunny
Enjoyable around 72°F 22°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds turning from the NE to the ESE at 8 mph 12 km/h.
Thursday, September 17, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
81°F 27°C
Partly Cloudy
Early-Evening
78°F 25°C
Sunny
Warm temperatures up to 81°F 27°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds switching from the SSE to the S at 9 mph 14 km/h.
Friday, September 18, 2026
Mid-Morning
76°F 25°C
Sunny
Mid-Afternoon
92°F 33°C
Sunny
Early-Evening
88°F 31°C
Sunny
Sizzling hot near 92°F 33°C with a heat index reaching 99°F 37°C, cloudy in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling. Winds moving from the SW to the ENE at 7 mph 11 km/h.
Saturday, September 19, 2026
Mid-Morning
68°F 20°C
Cloudy
Mid-Afternoon
74°F 24°C
Overcast
Early-Evening
67°F 20°C
Scattered Showers
Pleasant near 74°F 24°C, scattered downpours possible, with steady humidity and steady pressure. Winds E at 11 mph 18 km/h. Gusts up to 23 mph 37 km/h.
Sunday, September 20, 2026
Mid-Morning
67°F 19°C
Light Showers
Mid-Afternoon
84°F 29°C
Scattered Showers
Early-Evening
81°F 27°C
Sunny
Very warm near 84°F 29°C, though humidity makes it feel like 89°F 31°C, locally heavy downpours at times, with lower humidity and barometric pressure falling. Winds out of the SSE at 7 mph 11 km/h. Gusts up to 21 mph 34 km/h.
Monday, September 21, 2026
Mid-Morning
80°F 27°C
Sunny
Mid-Afternoon
82°F 28°C
Cloudy
Early-Evening
70°F 21°C
Overcast
Warm and summery around 82°F 28°C (feels like 85°F 30°C), sunny in the morning, overcast in the afternoon, and cloudy this evening, with increasing humidity and barometric pressure rising. Winds turning from the WSW to the ESE at 9 mph 14 km/h.
Tuesday, September 22, 2026
Mid-Morning
61°F 16°C
Overcast
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
61°F 16°C
Scattered Showers
Mildly cool near 63°F 17°C, scattered downpours possible, with steady humidity and steady pressure. Winds NE at 4 mph 6 km/h.
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