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Simpson, IL Weather Forecast


Simpson, IL Weather Forecast Dated: 952 PM Thu Sep 03 2026
Expect a hot stretch with plenty of sunshine and mostly dry weather over the coming period. comfortable humidity and no major pressure swings will dominate.
Thursday, September 3, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
98°F 37°C
Sunny
Early-Evening
90°F 32°C
Sunny
Sizzling hot near 98°F 37°C with a heat index reaching 111°F 44°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the SSW to the SSE at 9 mph 14 km/h.
Friday, September 4, 2026
Mid-Morning
88°F 31°C
Sunny
Mid-Afternoon
96°F 35°C
Cloudy
Early-Evening
92°F 33°C
Sunny
Hot and sweltering around 96°F 35°C (heat index 99°F 37°C), sunny in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds switching from the SW to the S at 9 mph 14 km/h.
Saturday, September 5, 2026
Mid-Morning
87°F 31°C
Sunny
Mid-Afternoon
102°F 39°C
Overcast
Early-Evening
87°F 30°C
Scattered Showers
Dangerously hot temperatures around 102°F 39°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the WSW to the W at 8 mph 13 km/h.
Sunday, September 6, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
90°F 32°C
Cloudy
Dangerously hot with a high of 100°F 38°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds out of the NNE at 10 mph 15 km/h.
Monday, September 7, 2026
Mid-Morning
73°F 23°C
Cloudy
Mid-Afternoon
93°F 34°C
Sunny
Early-Evening
84°F 29°C
Sunny
Very hot with a high of 93°F 34°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds blowing from the ENE at 8 mph 13 km/h.
Tuesday, September 8, 2026
Mid-Morning
79°F 26°C
Partly Cloudy
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
89°F 31°C
Sunny
Very hot with temperatures reaching 96°F 36°C, partly cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the S to the SSE at 9 mph 15 km/h. Gusts up to 20 mph 32 km/h.
Wednesday, September 9, 2026
Mid-Morning
85°F 30°C
Sunny
Mid-Afternoon
104°F 40°C
Sunny
Early-Evening
96°F 36°C
Partly Cloudy
Dangerously hot temperatures around 104°F 40°C, partly cloudy through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling. Winds switching from the SSW to the S at 9 mph 13 km/h.
Thursday, September 10, 2026
Mid-Morning
91°F 33°C
Sunny
Mid-Afternoon
108°F 42°C
Sunny
Early-Evening
99°F 38°C
Partly Cloudy
Dangerously hot with a high of 108°F 42°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds moving from the WSW to the SSW at 9 mph 15 km/h.
Friday, September 11, 2026
Mid-Morning
93°F 34°C
Sunny
Mid-Afternoon
104°F 40°C
Sunny
Early-Evening
94°F 35°C
Overcast
Scorching hot near 104°F 40°C, sunny in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the W to the ESE at 6 mph 10 km/h.
Saturday, September 12, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
103°F 39°C
Partly Cloudy
Early-Evening
93°F 34°C
Partly Cloudy
Sweltering heat reaching 103°F 39°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
88°F 31°C
Sunny
Mid-Afternoon
104°F 40°C
Sunny
Early-Evening
93°F 34°C
Sunny
Dangerously hot temperatures around 104°F 40°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds shifting from the SSE to the ESE at 8 mph 12 km/h.
Monday, September 14, 2026
Mid-Morning
83°F 28°C
Light Showers
Mid-Afternoon
102°F 39°C
Scattered Showers
Early-Evening
83°F 28°C
Overcast
Dangerously hot with a high of 102°F 39°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds turning from the SSW to the SE at 7 mph 11 km/h.
Tuesday, September 15, 2026
Mid-Morning
83°F 29°C
Sunny
Mid-Afternoon
105°F 40°C
Sunny
Early-Evening
91°F 33°C
Cloudy
Scorching hot near 105°F 40°C, sunny in the morning, becoming cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds switching from the SSW to the N at 5 mph 8 km/h.
Wednesday, September 16, 2026
Mid-Morning
84°F 29°C
Overcast
Mid-Afternoon
104°F 40°C
Sunny
Early-Evening
94°F 35°C
Sunny
Sweltering heat reaching 104°F 40°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
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