Flag Lake, WI 14 Day Weather
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Flag Lake, WI Weather Forecast


Flag Lake, WI Weather Forecast Dated: 1050 AM 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
53°F 12°C
Cloudy
Mid-Afternoon
67°F 19°C
Overcast
Early-Evening
64°F 18°C
Overcast
Refreshing around 67°F 19°C, cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure.
Friday, September 18, 2026
Mid-Morning
51°F 11°C
Overcast
Mid-Afternoon
50°F 10°C
Rain
Early-Evening
46°F 8°C
Rain
Cool and brisk at 50°F 10°C, clouds and showers taking over for the afternoon and evening, with increasing humidity and steady pressure.
Saturday, September 19, 2026
Mid-Morning
46°F 8°C
Light Showers
Mid-Afternoon
47°F 8°C
Fog
Early-Evening
47°F 8°C
Light Showers
Chilly near 47°F 8°C, passing showers during morning and evening, with a dry break midday, with steady humidity and steady pressure. Winds turning from the E to the NE at 8 mph 13 km/h. Gusts up to 22 mph 35 km/h.
Sunday, September 20, 2026
Mid-Morning
47°F 8°C
Overcast
Mid-Afternoon
60°F 15°C
Overcast
Early-Evening
51°F 11°C
Overcast
Cool with a high near 60°F 15°C, overcast throughout the day, with lower humidity and steady pressure. Winds switching from the NE to the ENE at 7 mph 11 km/h.
Monday, September 21, 2026
Mid-Morning
45°F 7°C
Overcast
Mid-Afternoon
46°F 8°C
Light Showers
Early-Evening
46°F 8°C
Light Showers
Brisk around 46°F 8°C, clouds and showers taking over for the afternoon and evening, with increasing humidity and barometric pressure falling. Winds moving from the E to the NE at 9 mph 15 km/h. Gusts up to 24 mph 39 km/h.
Tuesday, September 22, 2026
Mid-Morning
44°F 7°C
Light Showers
Mid-Afternoon
47°F 8°C
Light Fog
Early-Evening
47°F 8°C
Scattered Showers
Cool and brisk at 47°F 8°C, locally heavy downpours at times, with steady humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
49°F 9°C
Fog
Mid-Afternoon
53°F 12°C
Light Showers
Early-Evening
49°F 9°C
Scattered Showers
Chilly near 53°F 12°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the WSW at 15 mph 23 km/h. Gusts up to 32 mph 51 km/h.
Thursday, September 24, 2026
Mid-Morning
44°F 7°C
Overcast
Mid-Afternoon
47°F 9°C
Scattered Showers
Early-Evening
49°F 10°C
Scattered Showers
Crisp with a high near 47°F 9°C, scattered downpours possible, with lower humidity and barometric pressure rising. Winds shifting from the WNW to the NW at 12 mph 19 km/h. Gusts up to 29 mph 47 km/h.
Friday, September 25, 2026
Mid-Morning
44°F 7°C
Sunny
Mid-Afternoon
53°F 12°C
Sunny
Early-Evening
51°F 11°C
Sunny
Brisk around 53°F 12°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the NW to the WNW at 5 mph 8 km/h.
Saturday, September 26, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
61°F 16°C
Sunny
Mildly cool near 64°F 18°C, sunny throughout the day, with increasing humidity and barometric pressure falling. Winds switching from the SW to the SSW at 8 mph 12 km/h. Gusts up to 22 mph 35 km/h.
Sunday, September 27, 2026
Mid-Morning
56°F 14°C
Sunny
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
62°F 17°C
Overcast
Comfortable at 66°F 19°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the SSW at 14 mph 23 km/h. Gusts up to 36 mph 58 km/h.
Monday, September 28, 2026
Mid-Morning
60°F 15°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
68°F 20°C
Sunny
Comfortable with temperatures reaching 73°F 23°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the SW to the SE at 5 mph 8 km/h.
Tuesday, September 29, 2026
Mid-Morning
52°F 11°C
Overcast
Mid-Afternoon
45°F 7°C
Overcast
Early-Evening
44°F 7°C
Scattered Showers
Brisk around 45°F 7°C, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure rising. Winds shifting from the N to the NNW at 5 mph 7 km/h.
Wednesday, September 30, 2026
Mid-Morning
44°F 7°C
Sunny
Mid-Afternoon
53°F 12°C
Overcast
Early-Evening
50°F 11°C
Overcast
Cool and brisk at 53°F 12°C, sunny in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure.
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