Weather WorldFlat Lake, IL 14 Day Weather
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Flat Lake, IL Weather Forecast
Flat Lake, IL Weather Forecast Dated: 626 PM Thu Nov 12 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and a stable pattern will dominate.
Thursday, November 12, 2026
Mid-Morning
47°F 8°C
Partly Cloudy
Mid-Afternoon
47°F 8°C
Overcast
Early-Evening
42°F 5°C
Partly Cloudy
Brisk around 47°F 8°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds out of the NNW at 15 mph 24 km/h. Gusts up to 23 mph 37 km/h.
Friday, November 13, 2026
Mid-Morning
39°F 4°C
Partly Cloudy
Mid-Afternoon
44°F 7°C
Partly Cloudy
Early-Evening
38°F 4°C
Partly Cloudy
Biting cold near 44°F 7°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the NNW to the N at 7 mph 11 km/h.
Saturday, November 14, 2026
Mid-Morning
38°F 3°C
Sunny
Mid-Afternoon
47°F 8°C
Sunny
Early-Evening
38°F 3°C
Clear
Chilly near 47°F 8°C, sunny throughout the day, with steady humidity and steady pressure.
Sunday, November 15, 2026
Mid-Morning
41°F 5°C
Cloudy
Mid-Afternoon
51°F 10°C
Cloudy
Early-Evening
41°F 5°C
Partly Cloudy
Crisp with a high near 51°F 10°C, cloudy through the afternoon, turning sunny this evening, with steady humidity and steady pressure.
Monday, November 16, 2026
Mid-Morning
43°F 6°C
Sunny
Mid-Afternoon
54°F 12°C
Sunny
Early-Evening
43°F 6°C
Clear
Brisk around 54°F 12°C, sunny throughout the day, with steady humidity and steady pressure.
Tuesday, November 17, 2026
Mid-Morning
45°F 7°C
Partly Cloudy
Mid-Afternoon
56°F 13°C
Partly Cloudy
Early-Evening
45°F 7°C
Clear
Cool and brisk at 56°F 13°C, partly cloudy through the afternoon, turning sunny this evening, with steady humidity and barometric pressure falling.
Wednesday, November 18, 2026
Mid-Morning
47°F 8°C
Partly Cloudy
Mid-Afternoon
56°F 13°C
Cloudy
Early-Evening
50°F 10°C
Overcast
Chilly near 56°F 13°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling. Winds moving from the S to the SSE at 8 mph 13 km/h. Gusts up to 20 mph 32 km/h.
Thursday, November 19, 2026
Mid-Morning
52°F 11°C
Scattered Showers
Mid-Afternoon
58°F 15°C
Cloudy
Early-Evening
55°F 13°C
Scattered Showers
Cool with a high near 58°F 15°C, scattered downpours possible, with steady humidity and steady pressure. Winds swinging from the S to the SSE at 5 mph 9 km/h.
Friday, November 20, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
56°F 14°C
Overcast
Refreshing around 61°F 16°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds blowing from the SE at 7 mph 11 km/h.
Saturday, November 21, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
65°F 18°C
Partly Cloudy
Early-Evening
58°F 15°C
Cloudy
Mildly cool near 65°F 18°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the SSE to the SE at 8 mph 13 km/h. Gusts up to 20 mph 33 km/h.
Sunday, November 22, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
58°F 15°C
Light Showers
Early-Evening
57°F 14°C
Heavy Rain Showers
Comfortable at 58°F 15°C, clouds and showers taking over for the afternoon and evening, with increasing humidity and steady pressure. Winds switching from the SE to the SSE at 13 mph 20 km/h. Gusts up to 29 mph 47 km/h.
Monday, November 23, 2026
Mid-Morning
58°F 14°C
Light Rain
Mid-Afternoon
58°F 15°C
Light Rain
Early-Evening
54°F 12°C
Scattered Showers
Cool with a high near 58°F 15°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the SSE to the W at 7 mph 10 km/h. Gusts up to 21 mph 33 km/h.
Tuesday, November 24, 2026
Mid-Morning
46°F 8°C
Scattered Showers
Mid-Afternoon
51°F 11°C
Scattered Showers
Early-Evening
47°F 8°C
Partly Cloudy
Brisk around 51°F 11°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure rising. Winds swinging from the W to the WSW at 7 mph 11 km/h. Gusts up to 21 mph 33 km/h.
Wednesday, November 25, 2026
Mid-Morning
45°F 7°C
Cloudy
Mid-Afternoon
49°F 9°C
Overcast
Early-Evening
44°F 7°C
Scattered Showers
Cool and brisk at 49°F 9°C, scattered downpours possible, with steady humidity and steady pressure.
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