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Oregon, IL Weather Forecast
Oregon, IL Weather Forecast Dated: 424 PM Wed Sep 02 2026 (Oregon Time)
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. Isolated storms at times.
Wednesday, September 2, 2026
Mid-Morning
78°F 26°C
Sunny
Mid-Afternoon
91°F 33°C
Partly Cloudy
Early-Evening
84°F 29°C
Sunny
Sizzling hot near 91°F 33°C with a heat index reaching 95°F 35°C, sunny in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds turning from the SW to the SSE at 9 mph 14 km/h.
Thursday, September 3, 2026
Mid-Morning
80°F 27°C
Scattered Showers
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
81°F 28°C
Nearby Thunderstorms
Hot and sweltering around 90°F 32°C (heat index 95°F 35°C), scattered downpours possible, with steady humidity and steady pressure. A stray shower or storm late in the day.
Friday, September 4, 2026
Mid-Morning
76°F 24°C
Sunny
Mid-Afternoon
89°F 32°C
Nearby Thunderstorms
Early-Evening
84°F 29°C
Sunny
Very warm near 89°F 32°C, though humidity makes it feel like 96°F 36°C, heavy thunderstorms conditions at times, with steady humidity and steady pressure. Winds building from ENE at 0 mph 1 km/h to S at 8 mph 12 km/h.
Saturday, September 5, 2026
Mid-Morning
78°F 25°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
80°F 27°C
Sunny
Sizzling hot near 90°F 32°C with a heat index reaching 97°F 36°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds moving from the WSW to the ENE at 9 mph 14 km/h.
Sunday, September 6, 2026
Mid-Morning
70°F 21°C
Sunny
Mid-Afternoon
79°F 26°C
Partly Cloudy
Early-Evening
71°F 22°C
Partly Cloudy
Mild with a high of 79°F 26°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds swinging from the E to the ENE at 9 mph 14 km/h.
Monday, September 7, 2026
Mid-Morning
67°F 19°C
Partly Cloudy
Mid-Afternoon
76°F 25°C
Overcast
Early-Evening
74°F 23°C
Overcast
Pleasant near 76°F 25°C, overcast throughout the day, with steady humidity and steady pressure. Winds blowing from the SSE at 10 mph 15 km/h.
Tuesday, September 8, 2026
Mid-Morning
74°F 24°C
Overcast
Mid-Afternoon
90°F 32°C
Overcast
Early-Evening
88°F 31°C
Sunny
Sizzling hot near 90°F 32°C with a heat index reaching 97°F 36°C, overcast in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds turning from the SSW to the SE at 8 mph 13 km/h.
Wednesday, September 9, 2026
Mid-Morning
78°F 26°C
Overcast
Mid-Afternoon
85°F 29°C
Overcast
Early-Evening
81°F 27°C
Scattered Showers
Quite warm reaching 85°F 29°C, feeling like 91°F 33°C during peak afternoon, scattered downpours possible, with steady humidity and steady pressure.
Thursday, September 10, 2026
Mid-Morning
70°F 21°C
Light Showers
Mid-Afternoon
80°F 27°C
Scattered Showers
Early-Evening
74°F 24°C
Overcast
Warm temperatures up to 80°F 27°C, locally heavy downpours at times, with lower humidity and steady pressure.
Friday, September 11, 2026
Mid-Morning
66°F 19°C
Light Fog
Mid-Afternoon
77°F 25°C
Scattered Showers
Early-Evening
76°F 25°C
Light Showers
Mild with a high of 77°F 25°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling. Winds switching from the ESE to the SE at 10 mph 17 km/h. Gusts up to 22 mph 35 km/h.
Saturday, September 12, 2026
Mid-Morning
80°F 26°C
Overcast
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
86°F 30°C
Sunny
Hot and sweltering around 91°F 33°C (heat index 95°F 35°C), partly cloudy in the morning, sunny in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds moving from the SSW to the SW at 12 mph 18 km/h. Gusts up to 24 mph 38 km/h.
Sunday, September 13, 2026
Mid-Morning
73°F 23°C
Scattered Showers
Mid-Afternoon
77°F 25°C
Cloudy
Early-Evening
71°F 22°C
Scattered Showers
Comfortable with temperatures reaching 77°F 25°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds swinging from the SSW to the W at 9 mph 13 km/h.
Monday, September 14, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
66°F 19°C
Overcast
Enjoyable around 70°F 21°C, overcast throughout the day, with increasing humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
66°F 19°C
Sunny
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
73°F 22°C
Sunny
Warm temperatures up to 80°F 27°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the W at 10 mph 16 km/h.
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