Courthouse Square, IL 14 Day Weather
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Courthouse Square, IL Weather Forecast


Courthouse Square, IL Weather Forecast Dated: 551 AM Wed Sep 16 2026
Expect a very warm period with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Wednesday, September 16, 2026
Mid-Morning
63°F 17°C
Light Fog
Mid-Afternoon
77°F 25°C
Scattered Showers
Early-Evening
73°F 23°C
Overcast
Pleasant near 77°F 25°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds out of the ENE at 8 mph 13 km/h.
Thursday, September 17, 2026
Mid-Morning
70°F 21°C
Light Fog
Mid-Afternoon
82°F 28°C
Cloudy
Early-Evening
77°F 25°C
Overcast
Quite warm reaching 82°F 28°C, feeling like 87°F 31°C during peak afternoon, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and steady pressure.
Friday, September 18, 2026
Mid-Morning
71°F 22°C
Scattered Showers
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
83°F 29°C
Sunny
Very warm near 87°F 31°C, though humidity makes it feel like 93°F 34°C, locally heavy downpours at times, with lower humidity and barometric pressure falling. Winds switching from the ESE to the SE at 7 mph 11 km/h.
Saturday, September 19, 2026
Mid-Morning
75°F 24°C
Light Showers
Mid-Afternoon
88°F 31°C
Overcast
Early-Evening
81°F 27°C
Overcast
Warm and summery around 88°F 31°C (feels like 92°F 33°C), early showers breaking for a drier afternoon, with steady humidity and steady pressure.
Sunday, September 20, 2026
Mid-Morning
77°F 25°C
Overcast
Mid-Afternoon
86°F 30°C
Cloudy
Early-Evening
79°F 26°C
Overcast
Quite warm reaching 86°F 30°C, feeling like 89°F 32°C during peak afternoon, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds moving from the SE to the NW at 7 mph 11 km/h.
Monday, September 21, 2026
Mid-Morning
70°F 21°C
Light Showers
Mid-Afternoon
77°F 25°C
Scattered Showers
Early-Evening
72°F 23°C
Scattered Showers
Pleasant near 77°F 25°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds swinging from the SSW to the SSE at 7 mph 10 km/h.
Tuesday, September 22, 2026
Mid-Morning
67°F 19°C
Fog
Mid-Afternoon
74°F 23°C
Partly Cloudy
Early-Evening
68°F 20°C
Sunny
Comfortable with temperatures reaching 74°F 23°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds shifting from the NW to the NNW at 7 mph 11 km/h.
Wednesday, September 23, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
84°F 29°C
Overcast
Early-Evening
76°F 24°C
Overcast
Quite warm around 84°F 29°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds turning from the SSE to the WSW at 9 mph 14 km/h.
Thursday, September 24, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
57°F 14°C
Scattered Showers
Refreshing around 61°F 16°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds switching from the WNW to the NW at 15 mph 24 km/h. Gusts up to 27 mph 42 km/h.
Friday, September 25, 2026
Mid-Morning
55°F 13°C
Light Fog
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
62°F 17°C
Sunny
Mild with a high of 68°F 20°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the NNW to the SSE at 5 mph 7 km/h.
Saturday, September 26, 2026
Mid-Morning
60°F 16°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
68°F 20°C
Sunny
Pleasant near 74°F 23°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds swinging from the SSE to the SE at 9 mph 14 km/h.
Sunday, September 27, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
72°F 23°C
Overcast
Balmy with temperatures reaching 80°F 27°C, partly cloudy in the morning, overcast in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure. Winds shifting from the S to the SSE at 8 mph 12 km/h.
Monday, September 28, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
83°F 28°C
Sunny
Quite warm around 87°F 31°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling. Winds turning from the S to the SSE at 11 mph 18 km/h. Gusts up to 23 mph 38 km/h.
Tuesday, September 29, 2026
Mid-Morning
71°F 22°C
Light Showers
Mid-Afternoon
69°F 21°C
Scattered Showers
Early-Evening
61°F 16°C
Light Showers
Mild temperatures up to 69°F 21°C, scattered downpours possible, with steady humidity and steady pressure. Winds switching from the SW to the NW at 6 mph 9 km/h.
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