Weather WorldFlat Lake, IL 14 Day Weather
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Flat Lake, IL Weather Forecast
Flat Lake, IL Weather Forecast Dated: 346 AM Fri Nov 13 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.
Friday, November 13, 2026
Mid-Morning
39°F 4°C
Partly Cloudy
Mid-Afternoon
44°F 6°C
Partly Cloudy
Early-Evening
38°F 4°C
Partly Cloudy
Nippy around 44°F 6°C, cloudy throughout the day, with steady humidity and steady pressure. Winds turning 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
Cool and brisk at 47°F 8°C, sunny throughout the day, with steady humidity and steady pressure.
Sunday, November 15, 2026
Mid-Morning
41°F 5°C
Partly Cloudy
Mid-Afternoon
51°F 11°C
Sunny
Early-Evening
41°F 5°C
Clear
Chilly near 51°F 11°C, partly cloudy in the morning, becoming sunny through the afternoon and 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
Crisp with a high near 54°F 12°C, sunny throughout the day, with steady humidity and steady pressure.
Tuesday, November 17, 2026
Mid-Morning
44°F 7°C
Sunny
Mid-Afternoon
55°F 13°C
Sunny
Early-Evening
44°F 7°C
Clear
Brisk around 55°F 13°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Wednesday, November 18, 2026
Mid-Morning
48°F 9°C
Cloudy
Mid-Afternoon
58°F 14°C
Partly Cloudy
Early-Evening
51°F 11°C
Clear
Mildly cool near 58°F 14°C, cloudy in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the SSE at 10 mph 17 km/h. Gusts up to 22 mph 36 km/h.
Thursday, November 19, 2026
Mid-Morning
54°F 12°C
Scattered Showers
Mid-Afternoon
59°F 15°C
Cloudy
Early-Evening
56°F 13°C
Cloudy
Comfortable at 59°F 15°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds S at 6 mph 10 km/h.
Friday, November 20, 2026
Mid-Morning
58°F 14°C
Scattered Showers
Mid-Afternoon
60°F 16°C
Cloudy
Early-Evening
55°F 13°C
Partly Cloudy
Cool with a high near 60°F 16°C, scattered downpours possible, with steady humidity and steady pressure.
Saturday, November 21, 2026
Mid-Morning
57°F 14°C
Partly Cloudy
Mid-Afternoon
64°F 18°C
Cloudy
Early-Evening
57°F 14°C
Cloudy
Refreshing around 64°F 18°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure.
Sunday, November 22, 2026
Mid-Morning
57°F 14°C
Cloudy
Mid-Afternoon
63°F 17°C
Cloudy
Early-Evening
59°F 15°C
Overcast
Mildly cool near 63°F 17°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds out of the SSE at 7 mph 12 km/h. Gusts up to 21 mph 34 km/h.
Monday, November 23, 2026
Mid-Morning
55°F 13°C
Scattered Showers
Mid-Afternoon
56°F 13°C
Drizzle
Early-Evening
48°F 9°C
Drizzle
Chilly near 56°F 13°C, scattered downpours possible, with steady humidity and steady pressure. Winds shifting from the SE to the NNE at 5 mph 8 km/h. Gusts up to 25 mph 39 km/h.
Tuesday, November 24, 2026
Mid-Morning
44°F 7°C
Scattered Showers
Mid-Afternoon
47°F 8°C
Scattered Showers
Early-Evening
42°F 6°C
Clear
Crisp with a high near 47°F 8°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds turning from the NW to the WNW at 7 mph 11 km/h. Gusts up to 22 mph 36 km/h.
Wednesday, November 25, 2026
Mid-Morning
40°F 5°C
Sunny
Mid-Afternoon
46°F 8°C
Partly Cloudy
Early-Evening
41°F 5°C
Cloudy
Brisk around 46°F 8°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure.
Thursday, November 26, 2026
Mid-Morning
41°F 5°C
Partly Cloudy
Mid-Afternoon
44°F 7°C
Sunny
Early-Evening
36°F 2°C
Clear
Biting cold near 44°F 7°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.
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