Weather WorldFlat Lake, MT 14 Day Weather
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Flat Lake, MT Weather Forecast
Flat Lake, MT Weather Forecast Dated: 229 PM Fri Sep 18 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.
Friday, September 18, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
65°F 19°C
Scattered Showers
Pleasant near 72°F 22°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds turning from the S to the NE at 11 mph 17 km/h.
Saturday, September 19, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
64°F 18°C
Overcast
Early-Evening
59°F 15°C
Overcast
Mildly cool near 64°F 18°C, overcast throughout the day, with lower humidity and steady pressure. Winds switching from the NE to the ENE at 13 mph 20 km/h. Gusts up to 21 mph 33 km/h.
Sunday, September 20, 2026
Mid-Morning
48°F 9°C
Light Showers
Mid-Afternoon
48°F 9°C
Light Showers
Early-Evening
48°F 9°C
Light Showers
Chilly near 48°F 9°C, on-and-off showers throughout the day, with steady humidity and steady pressure. Winds moving from the ESE to the SE at 9 mph 14 km/h.
Monday, September 21, 2026
Mid-Morning
51°F 11°C
Partly Cloudy
Mid-Afternoon
60°F 16°C
Overcast
Early-Evening
58°F 14°C
Overcast
Cool with a high near 60°F 16°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds out of the SSE at 14 mph 22 km/h. Gusts up to 21 mph 33 km/h.
Tuesday, September 22, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
69°F 21°C
Sunny
Early-Evening
69°F 21°C
Sunny
Mild with a high of 69°F 21°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds blowing from the S at 12 mph 20 km/h. Gusts up to 21 mph 33 km/h.
Wednesday, September 23, 2026
Mid-Morning
58°F 14°C
Cloudy
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
80°F 27°C
Sunny
Pleasant near 76°F 25°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds turning from the S to the ESE at 3 mph 6 km/h.
Thursday, September 24, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
83°F 28°C
Sunny
Balmy with temperatures reaching 82°F 28°C, sunny throughout the day, with lower humidity and steady pressure. Winds switching from the S to the SSE at 14 mph 22 km/h. Gusts up to 29 mph 47 km/h.
Friday, September 25, 2026
Mid-Morning
60°F 15°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
75°F 24°C
Sunny
Enjoyable around 77°F 25°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds blowing from the SSE at 19 mph 30 km/h. Gusts up to 31 mph 49 km/h.
Saturday, September 26, 2026
Mid-Morning
51°F 10°C
Overcast
Mid-Afternoon
51°F 11°C
Scattered Showers
Early-Evening
82°F 28°C
Partly Cloudy
Brisk around 51°F 11°C, locally heavy downpours at times, with lower humidity and barometric pressure falling. Winds decreasing from NNW 17 mph 27 km/h to ESE 7 mph 11 km/h.
Sunday, September 27, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
62°F 17°C
Overcast
Early-Evening
62°F 17°C
Sunny
Mildly cool near 62°F 17°C, sunny in the morning, overcast in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds easing from WSW 19 mph 31 km/h to SSW 9 mph 15 km/h.
Monday, September 28, 2026
Mid-Morning
50°F 10°C
Overcast
Mid-Afternoon
54°F 12°C
Cloudy
Early-Evening
48°F 9°C
Scattered Showers
Chilly near 54°F 12°C, scattered downpours possible, with increasing humidity and steady pressure. Winds turning from the SSW to the SW at 15 mph 24 km/h. Gusts up to 21 mph 34 km/h.
Tuesday, September 29, 2026
Mid-Morning
45°F 7°C
Overcast
Mid-Afternoon
44°F 6°C
Scattered Showers
Early-Evening
42°F 6°C
Overcast
Cold with a high near 44°F 6°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds NNW at 13 mph 22 km/h.
Wednesday, September 30, 2026
Mid-Morning
35°F 2°C
Scattered Showers
Mid-Afternoon
38°F 3°C
Scattered Showers
Early-Evening
38°F 3°C
Scattered Showers
Nippy around 38°F 3°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds moving from the NNW to the NW at 5 mph 8 km/h.
Thursday, October 1, 2026
Mid-Morning
38°F 3°C
Sunny
Mid-Afternoon
51°F 10°C
Sunny
Early-Evening
53°F 12°C
Overcast
Cool and brisk at 51°F 10°C, sunny through the afternoon, turning overcast this evening, with lower humidity and barometric pressure falling.
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