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Brian Lake, IL Weather Forecast
Brian Lake, IL Weather Forecast Dated: 1037 PM Thu Sep 24 2026
Expect a mild stretch with more clouds than sun and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Thursday, September 24, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
70°F 21°C
Scattered Showers
Early-Evening
64°F 18°C
Scattered Showers
Pleasant near 70°F 21°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the NE to the ESE at 7 mph 11 km/h.
Friday, September 25, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
61°F 17°C
Overcast
Mildly cool near 63°F 17°C, overcast throughout the day, with lower humidity and steady pressure. Winds switching from the E to the ENE at 6 mph 10 km/h.
Saturday, September 26, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
72°F 22°C
Cloudy
Early-Evening
67°F 20°C
Overcast
Enjoyable around 72°F 22°C, overcast throughout the day, with lower humidity and steady pressure. Winds E at 5 mph 8 km/h.
Sunday, September 27, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
72°F 22°C
Cloudy
Early-Evening
64°F 18°C
Sunny
Mild temperatures up to 72°F 22°C, overcast through the afternoon, turning sunny this evening, with steady humidity and steady pressure.
Monday, September 28, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
74°F 23°C
Overcast
Early-Evening
68°F 20°C
Overcast
Mild with a high of 74°F 23°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling.
Tuesday, September 29, 2026
Mid-Morning
60°F 16°C
Overcast
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
67°F 19°C
Scattered Showers
Pleasant near 72°F 22°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds swinging from the SSE to the E at 8 mph 13 km/h.
Wednesday, September 30, 2026
Mid-Morning
65°F 19°C
Overcast
Mid-Afternoon
69°F 20°C
Overcast
Early-Evening
71°F 22°C
Scattered Showers
Comfortable with temperatures reaching 69°F 20°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds shifting from the SSE to the SE at 9 mph 14 km/h.
Thursday, October 1, 2026
Mid-Morning
75°F 24°C
Overcast
Mid-Afternoon
87°F 30°C
Overcast
Early-Evening
80°F 27°C
Overcast
Quite warm around 87°F 30°C, overcast throughout the day, with increasing humidity and steady pressure. Winds decreasing from S 16 mph 25 km/h to NW 6 mph 10 km/h.
Friday, October 2, 2026
Mid-Morning
70°F 21°C
Light Showers
Mid-Afternoon
70°F 21°C
Light Showers
Early-Evening
71°F 22°C
Heavy Rain Showers
Mild temperatures up to 70°F 21°C, on-and-off showers throughout the day, with steady humidity and steady pressure. Winds out of the SSW at 10 mph 16 km/h.
Saturday, October 3, 2026
Mid-Morning
67°F 19°C
Light Fog
Mid-Afternoon
73°F 23°C
Scattered Showers
Early-Evening
71°F 22°C
Overcast
Mild with a high of 73°F 23°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure.
Sunday, October 4, 2026
Mid-Morning
69°F 21°C
Light Fog
Mid-Afternoon
81°F 27°C
Scattered Showers
Early-Evening
68°F 20°C
Sunny
Warm and summery near 81°F 27°C, scattered downpours possible, with lower humidity and steady pressure. Winds building from S at 6 mph 10 km/h to NW at 17 mph 27 km/h. Gusts up to 26 mph 42 km/h.
Monday, October 5, 2026
Mid-Morning
45°F 7°C
Scattered Showers
Mid-Afternoon
54°F 12°C
Partly Cloudy
Early-Evening
50°F 10°C
Overcast
Crisp with a high near 54°F 12°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds NW at 13 mph 21 km/h.
Tuesday, October 6, 2026
Mid-Morning
47°F 8°C
Sunny
Mid-Afternoon
55°F 13°C
Sunny
Early-Evening
53°F 12°C
Cloudy
Brisk around 55°F 13°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds out of the NNW at 9 mph 15 km/h.
Wednesday, October 7, 2026
Mid-Morning
48°F 9°C
Partly Cloudy
Mid-Afternoon
60°F 15°C
Overcast
Early-Evening
58°F 14°C
Cloudy
Mildly cool near 60°F 15°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds blowing from the SW at 9 mph 15 km/h.
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