Upper Bluff Lake, IL 14 Day Weather
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Upper Bluff Lake, IL Weather Forecast


Upper Bluff Lake, IL Weather Forecast Dated: 428 PM Wed Sep 16 2026
Expect a hot stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 16, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
98°F 37°C
Sunny
Early-Evening
90°F 32°C
Sunny
Very hot with temperatures reaching 98°F 37°C, sunny throughout the day, with lower humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
85°F 29°C
Sunny
Mid-Afternoon
99°F 37°C
Sunny
Early-Evening
91°F 33°C
Cloudy
Hot and sweltering around 99°F 37°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 SW to the SE at 7 mph 10 km/h.
Friday, September 18, 2026
Mid-Morning
85°F 29°C
Sunny
Mid-Afternoon
100°F 38°C
Overcast
Early-Evening
90°F 32°C
Partly Cloudy
Dangerously hot temperatures around 100°F 38°C, sunny in the morning, overcast in the afternoon, and partly cloudy this evening, with steady humidity and barometric pressure falling.
Saturday, September 19, 2026
Mid-Morning
87°F 30°C
Sunny
Mid-Afternoon
100°F 38°C
Overcast
Early-Evening
89°F 32°C
Overcast
Dangerously hot with a high of 100°F 38°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the W to the E at 7 mph 10 km/h.
Sunday, September 20, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
100°F 38°C
Partly Cloudy
Early-Evening
91°F 33°C
Sunny
Scorching hot near 100°F 38°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds moving from the SW to the WNW at 6 mph 10 km/h.
Monday, September 21, 2026
Mid-Morning
75°F 24°C
Overcast
Mid-Afternoon
83°F 29°C
Scattered Showers
Early-Evening
74°F 23°C
Light Showers
Very warm near 83°F 29°C, though humidity makes it feel like 87°F 30°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds swinging from the SE to the SSE at 5 mph 7 km/h.
Tuesday, September 22, 2026
Mid-Morning
72°F 22°C
Fog
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
79°F 26°C
Sunny
Balmy with temperatures reaching 87°F 31°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds shifting from the NW to the NE at 6 mph 9 km/h.
Wednesday, September 23, 2026
Mid-Morning
76°F 24°C
Sunny
Mid-Afternoon
90°F 32°C
Overcast
Early-Evening
81°F 28°C
Sunny
Sizzling hot with 90°F 32°C, cloudy in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling. Winds S at 8 mph 13 km/h.
Thursday, September 24, 2026
Mid-Morning
67°F 20°C
Scattered Showers
Mid-Afternoon
76°F 25°C
Scattered Showers
Early-Evening
68°F 20°C
Sunny
Mild temperatures up to 76°F 25°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds switching from the WNW to the NW at 9 mph 14 km/h.
Friday, September 25, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
74°F 24°C
Sunny
Early-Evening
67°F 19°C
Sunny
Mild with a high of 74°F 24°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the ESE to the NE at 5 mph 8 km/h.
Saturday, September 26, 2026
Mid-Morning
64°F 18°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 steady pressure. Winds E at 8 mph 13 km/h.
Sunday, September 27, 2026
Mid-Morning
69°F 21°C
Sunny
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
81°F 27°C
Sunny
Balmy with temperatures reaching 88°F 31°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the SSE at 9 mph 15 km/h.
Monday, September 28, 2026
Mid-Morning
76°F 24°C
Sunny
Mid-Afternoon
87°F 31°C
Cloudy
Early-Evening
83°F 28°C
Overcast
Quite warm around 87°F 31°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds turning from the SSE to the SE at 8 mph 13 km/h. Gusts up to 20 mph 32 km/h.
Tuesday, September 29, 2026
Mid-Morning
78°F 26°C
Overcast
Mid-Afternoon
85°F 30°C
Overcast
Early-Evening
77°F 25°C
Overcast
Quite warm reaching 85°F 30°C, feeling like 88°F 31°C during peak afternoon, overcast throughout the day, with increasing humidity and steady pressure.
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