Weather WorldFlat Lake, WI 14 Day Weather
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Flat Lake, WI Weather Forecast
Flat Lake, WI Weather Forecast Dated: 222 PM Thu Sep 17 2026
Expect a cool pattern with more clouds than sun and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Thursday, September 17, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
69°F 21°C
Overcast
Early-Evening
65°F 18°C
Overcast
Pleasant near 69°F 21°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure.
Friday, September 18, 2026
Mid-Morning
54°F 12°C
Scattered Showers
Mid-Afternoon
54°F 12°C
Drizzle
Early-Evening
52°F 11°C
Light Rain
Cool and brisk at 54°F 12°C, scattered downpours possible, with increasing humidity and steady pressure.
Saturday, September 19, 2026
Mid-Morning
47°F 8°C
Scattered Showers
Mid-Afternoon
51°F 11°C
Overcast
Early-Evening
52°F 11°C
Overcast
Chilly near 51°F 11°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds out of the NE at 9 mph 15 km/h. Gusts up to 22 mph 36 km/h.
Sunday, September 20, 2026
Mid-Morning
53°F 12°C
Overcast
Mid-Afternoon
58°F 15°C
Overcast
Early-Evening
49°F 9°C
Overcast
Cool with a high near 58°F 15°C, overcast throughout the day, with steady humidity and steady pressure. Winds blowing from the ENE at 12 mph 19 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 21, 2026
Mid-Morning
45°F 7°C
Overcast
Mid-Afternoon
48°F 9°C
Light Rain
Early-Evening
48°F 9°C
Light Rain
Brisk around 48°F 9°C, clouds and showers taking over for the afternoon and evening, with increasing humidity and barometric pressure falling. Winds moving from the ENE to the NE at 11 mph 17 km/h. Gusts up to 25 mph 40 km/h.
Tuesday, September 22, 2026
Mid-Morning
48°F 9°C
Fog
Mid-Afternoon
53°F 12°C
Scattered Showers
Early-Evening
50°F 11°C
Scattered Showers
Cool and brisk at 53°F 12°C, locally heavy downpours at times, with steady humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
50°F 10°C
Light Fog
Mid-Afternoon
54°F 12°C
Rain
Early-Evening
49°F 9°C
Scattered Showers
Chilly near 54°F 12°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds swinging from the SSE to the W at 16 mph 25 km/h. Gusts up to 33 mph 53 km/h.
Thursday, September 24, 2026
Mid-Morning
47°F 8°C
Overcast
Mid-Afternoon
55°F 13°C
Cloudy
Early-Evening
55°F 13°C
Sunny
Crisp with a high near 55°F 13°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure rising. Winds shifting from the NW to the WNW at 8 mph 13 km/h. Gusts up to 23 mph 37 km/h.
Friday, September 25, 2026
Mid-Morning
47°F 9°C
Sunny
Mid-Afternoon
58°F 15°C
Sunny
Early-Evening
54°F 13°C
Sunny
Refreshing around 58°F 15°C, sunny throughout the day, with lower humidity and steady pressure.
Saturday, September 26, 2026
Mid-Morning
53°F 12°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
64°F 18°C
Sunny
Mild with a high of 68°F 20°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling. Winds turning from the SSW to the S at 11 mph 17 km/h. Gusts up to 28 mph 45 km/h.
Sunday, September 27, 2026
Mid-Morning
60°F 16°C
Sunny
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
64°F 18°C
Overcast
Comfortable at 66°F 19°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds out of the SSW at 14 mph 22 km/h. Gusts up to 30 mph 49 km/h.
Monday, September 28, 2026
Mid-Morning
63°F 17°C
Light Fog
Mid-Afternoon
73°F 23°C
Cloudy
Early-Evening
67°F 19°C
Sunny
Comfortable with temperatures reaching 73°F 23°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure.
Tuesday, September 29, 2026
Mid-Morning
50°F 10°C
Overcast
Mid-Afternoon
47°F 9°C
Light Showers
Early-Evening
51°F 10°C
Partly Cloudy
Brisk around 47°F 9°C, drier morning followed by scattered afternoon showers, with steady humidity and steady pressure. Winds moving from the N to the NNW at 3 mph 5 km/h.
Wednesday, September 30, 2026
Mid-Morning
46°F 8°C
Overcast
Mid-Afternoon
54°F 12°C
Overcast
Early-Evening
48°F 9°C
Overcast
Cool and brisk at 54°F 12°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.
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