Illiopolis, IL 14 Day Weather - 62539 WeatherWorld.com
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Illiopolis, IL Weather Forecast


Illiopolis, IL Weather Forecast Dated: 102 AM Mon Oct 05 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Monday, October 5, 2026
Mid-Morning
58°F 14°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
62°F 17°C
Sunny
Pleasant near 72°F 22°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Tuesday, October 6, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
67°F 19°C
Sunny
Comfortable with temperatures reaching 77°F 25°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds turning from the SSE to the S at 7 mph 12 km/h.
Wednesday, October 7, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
74°F 24°C
Sunny
Quite warm around 84°F 29°C, sunny through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure. Winds switching from the WSW to the N at 7 mph 11 km/h.
Thursday, October 8, 2026
Mid-Morning
61°F 16°C
Partly Cloudy
Mid-Afternoon
74°F 24°C
Partly Cloudy
Early-Evening
65°F 18°C
Overcast
Mild temperatures up to 74°F 24°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and steady pressure. Winds moving from the N to the NE at 7 mph 11 km/h.
Friday, October 9, 2026
Mid-Morning
61°F 16°C
Overcast
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
63°F 18°C
Overcast
Mild with a high of 73°F 23°C, overcast throughout the day, with steady humidity and steady pressure.
Saturday, October 10, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
71°F 22°C
Sunny
Warm and summery near 80°F 27°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds swinging from the E to the SE at 10 mph 15 km/h. Gusts up to 21 mph 34 km/h.
Sunday, October 11, 2026
Mid-Morning
69°F 21°C
Partly Cloudy
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
73°F 23°C
Overcast
Balmy with temperatures reaching 81°F 27°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds shifting from the S to the SE at 6 mph 9 km/h.
Monday, October 12, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
73°F 23°C
Sunny
Quite warm around 80°F 27°C, cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure.
Tuesday, October 13, 2026
Mid-Morning
69°F 20°C
Sunny
Mid-Afternoon
83°F 28°C
Partly Cloudy
Early-Evening
73°F 23°C
Scattered Showers
Warm temperatures up to 83°F 28°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds turning from the S to the E at 13 mph 20 km/h. Gusts up to 20 mph 32 km/h.
Wednesday, October 14, 2026
Mid-Morning
60°F 15°C
Rain
Mid-Afternoon
64°F 18°C
Scattered Showers
Early-Evening
57°F 14°C
Overcast
Mildly cool near 64°F 18°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds switching from the SE to the W at 14 mph 22 km/h. Gusts up to 24 mph 38 km/h.
Thursday, October 15, 2026
Mid-Morning
43°F 6°C
Partly Cloudy
Mid-Afternoon
49°F 10°C
Overcast
Early-Evening
46°F 8°C
Partly Cloudy
Chilly near 49°F 10°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds tapering down from W 17 mph 27 km/h to WNW 8 mph 12 km/h.
Friday, October 16, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
60°F 16°C
Scattered Showers
Comfortable with temperatures reaching 68°F 20°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds swinging from the SSW to the WNW at 11 mph 17 km/h. Gusts up to 20 mph 32 km/h.
Saturday, October 17, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
57°F 14°C
Scattered Showers
Early-Evening
52°F 11°C
Sunny
Brisk around 57°F 14°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds shifting from the NNW to the NW at 8 mph 14 km/h.
Sunday, October 18, 2026
Mid-Morning
48°F 9°C
Scattered Showers
Mid-Afternoon
53°F 12°C
Scattered Showers
Early-Evening
49°F 9°C
Overcast
Cool and brisk at 53°F 12°C, scattered downpours possible, with lower humidity and steady pressure. Winds turning from the NW to the WSW at 7 mph 11 km/h.
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