Lower Flat Lake, IL 14 Day Weather
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Lower Flat Lake, IL Weather Forecast


Lower Flat Lake, IL Weather Forecast Dated: 1034 PM Wed Sep 23 2026
Expect a cool pattern 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 23, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
73°F 23°C
Partly Cloudy
Early-Evening
66°F 19°C
Overcast
Pleasant near 73°F 23°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds turning from the NNE to the NE at 10 mph 16 km/h.
Thursday, September 24, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
77°F 25°C
Overcast
Early-Evening
71°F 21°C
Overcast
Comfortable with temperatures reaching 77°F 25°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure.
Friday, September 25, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
68°F 20°C
Overcast
Early-Evening
64°F 18°C
Overcast
Enjoyable around 68°F 20°C, overcast throughout the day, with steady humidity and steady pressure.
Saturday, September 26, 2026
Mid-Morning
60°F 15°C
Scattered Showers
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
61°F 16°C
Overcast
Cool with a high near 61°F 16°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure.
Sunday, September 27, 2026
Mid-Morning
61°F 16°C
Overcast
Mid-Afternoon
74°F 23°C
Overcast
Early-Evening
69°F 20°C
Cloudy
Mild with a high of 74°F 23°C, overcast through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds switching from the SE to the ENE at 5 mph 8 km/h.
Monday, September 28, 2026
Mid-Morning
63°F 17°C
Cloudy
Mid-Afternoon
78°F 25°C
Sunny
Early-Evening
71°F 22°C
Overcast
Pleasant near 78°F 25°C, overcast in the morning, cloudy in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling. Winds moving from the SE to the ESE at 7 mph 11 km/h.
Tuesday, September 29, 2026
Mid-Morning
63°F 17°C
Light Showers
Mid-Afternoon
66°F 19°C
Heavy Rain Showers
Early-Evening
68°F 20°C
Light Showers
Comfortable at 66°F 19°C, rounds of showers expected off and on all day, with increasing humidity and barometric pressure falling. Winds swinging from the SE to the S at 16 mph 25 km/h. Gusts up to 33 mph 52 km/h.
Wednesday, September 30, 2026
Mid-Morning
56°F 13°C
Scattered Showers
Mid-Afternoon
65°F 18°C
Sunny
Early-Evening
60°F 16°C
Sunny
Cool with a high near 65°F 18°C, scattered downpours possible, with lower humidity and barometric pressure rising. Winds blowing from the NW at 19 mph 30 km/h. Gusts up to 21 mph 33 km/h.
Thursday, October 1, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
64°F 18°C
Cloudy
Mild temperatures up to 71°F 22°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure.
Friday, October 2, 2026
Mid-Morning
61°F 16°C
Overcast
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
66°F 19°C
Sunny
Mild with a high of 73°F 23°C, cloudy in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure.
Saturday, October 3, 2026
Mid-Morning
62°F 17°C
Partly Cloudy
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
63°F 17°C
Sunny
Pleasant near 72°F 22°C, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the NNW to the ESE at 14 mph 23 km/h. Gusts up to 26 mph 42 km/h.
Sunday, October 4, 2026
Mid-Morning
51°F 11°C
Cloudy
Mid-Afternoon
58°F 14°C
Overcast
Early-Evening
48°F 9°C
Overcast
Cool with a high near 58°F 14°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds switching from the N to the WSW at 15 mph 24 km/h. Gusts up to 25 mph 40 km/h.
Monday, October 5, 2026
Mid-Morning
46°F 8°C
Overcast
Mid-Afternoon
56°F 13°C
Sunny
Early-Evening
52°F 11°C
Partly Cloudy
Brisk around 56°F 13°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds blowing from the N at 11 mph 18 km/h.
Tuesday, October 6, 2026
Mid-Morning
49°F 9°C
Sunny
Mid-Afternoon
62°F 17°C
Cloudy
Early-Evening
56°F 13°C
Sunny
Mildly cool near 62°F 17°C, partly cloudy through the afternoon, turning sunny this evening, with lower humidity and steady pressure.
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