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Sparta, IL Weather Forecast
Sparta, IL Weather Forecast Dated: 1050 PM Fri Sep 11 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.
Friday, September 11, 2026
Mid-Morning
72°F 22°C
Light Fog
Mid-Afternoon
81°F 27°C
Scattered Showers
Early-Evening
77°F 25°C
Scattered Showers
Warm and summery around 81°F 27°C (feels like 86°F 30°C), periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds turning from the E to the SW at 7 mph 12 km/h.
Saturday, September 12, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
92°F 33°C
Sunny
Early-Evening
85°F 30°C
Cloudy
Hot and sweltering around 92°F 33°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
79°F 26°C
Cloudy
Mid-Afternoon
94°F 35°C
Sunny
Early-Evening
81°F 27°C
Scattered Showers
Sizzling hot with 94°F 35°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds building from SSW at 5 mph 8 km/h to NE at 13 mph 22 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 14, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
85°F 30°C
Overcast
Early-Evening
83°F 29°C
Overcast
Warm temperatures up to 85°F 30°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling. Winds moving from the ENE to the ESE at 10 mph 15 km/h. Gusts up to 20 mph 32 km/h.
Tuesday, September 15, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
103°F 39°C
Partly Cloudy
Early-Evening
93°F 34°C
Sunny
Scorching hot near 103°F 39°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds swinging from the SSW to the NE at 11 mph 17 km/h. Gusts up to 21 mph 34 km/h.
Wednesday, September 16, 2026
Mid-Morning
80°F 27°C
Cloudy
Mid-Afternoon
102°F 39°C
Partly Cloudy
Early-Evening
92°F 34°C
Partly Cloudy
Sweltering heat reaching 102°F 39°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds blowing from the SW at 15 mph 23 km/h.
Thursday, September 17, 2026
Mid-Morning
85°F 30°C
Scattered Showers
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
85°F 29°C
Sunny
Sizzling hot near 96°F 36°C with a heat index reaching 100°F 38°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds turning from the WNW to the NNW at 12 mph 20 km/h. Gusts up to 22 mph 35 km/h.
Friday, September 18, 2026
Mid-Morning
71°F 22°C
Scattered Showers
Mid-Afternoon
82°F 28°C
Overcast
Early-Evening
79°F 26°C
Overcast
Quite warm around 82°F 28°C, scattered downpours possible, with lower humidity and barometric pressure falling. Winds out of the WSW at 7 mph 11 km/h.
Saturday, September 19, 2026
Mid-Morning
69°F 20°C
Overcast
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
70°F 21°C
Overcast
Mild temperatures up to 72°F 22°C, overcast throughout the day, with lower humidity and steady pressure. Winds moving from the NNE to the E at 5 mph 8 km/h.
Sunday, September 20, 2026
Mid-Morning
67°F 19°C
Overcast
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
75°F 24°C
Sunny
Very warm with a high of 83°F 28°C, partly cloudy in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds ENE at 10 mph 17 km/h.
Monday, September 21, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
83°F 29°C
Sunny
Early-Evening
76°F 24°C
Sunny
Warm and summery near 83°F 29°C, sunny throughout the day, with lower humidity and steady pressure. Winds shifting from the NE to the ENE at 12 mph 20 km/h. Gusts up to 26 mph 41 km/h.
Tuesday, September 22, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
75°F 24°C
Sunny
Balmy with temperatures reaching 84°F 29°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the NE to the ENE at 8 mph 13 km/h.
Wednesday, September 23, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
76°F 24°C
Sunny
Quite warm around 84°F 29°C, sunny through the afternoon, turning overcast this evening, with lower humidity and steady pressure.
Thursday, September 24, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
80°F 26°C
Sunny
Warm temperatures up to 87°F 31°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds SSE at 7 mph 11 km/h.
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