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Big Dam, MT Weather Forecast
Big Dam, MT Weather Forecast Dated: 1031 AM Sun Sep 13 2026
Expect a cool pattern with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Sunday, September 13, 2026
Mid-Morning
47°F 9°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
59°F 15°C
Overcast
Refreshing around 64°F 18°C, sunny through the afternoon, turning overcast this evening, with lower humidity and barometric pressure falling. Winds turning from the ENE to the W at 13 mph 20 km/h. Gusts up to 21 mph 33 km/h.
Monday, September 14, 2026
Mid-Morning
48°F 9°C
Overcast
Mid-Afternoon
50°F 10°C
Scattered Showers
Early-Evening
51°F 11°C
Scattered Showers
Cool and brisk at 50°F 10°C, scattered downpours possible, with steady humidity and barometric pressure rising. Winds switching from the W to the NW at 12 mph 20 km/h. Gusts up to 24 mph 38 km/h.
Tuesday, September 15, 2026
Mid-Morning
47°F 8°C
Overcast
Mid-Afternoon
55°F 13°C
Overcast
Early-Evening
55°F 13°C
Overcast
Chilly near 55°F 13°C, overcast throughout the day, with lower humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
61°F 16°C
Sunny
Cool with a high near 63°F 17°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds moving from the ESE to the S at 9 mph 14 km/h.
Thursday, September 17, 2026
Mid-Morning
58°F 15°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
69°F 20°C
Cloudy
Mild with a high of 74°F 23°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.
Friday, September 18, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
68°F 20°C
Overcast
Pleasant near 71°F 22°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure.
Saturday, September 19, 2026
Mid-Morning
59°F 15°C
Light Showers
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
60°F 16°C
Overcast
Comfortable at 65°F 18°C, early showers breaking for a drier afternoon, with steady humidity and steady pressure. Winds swinging from the E to the SSW at 8 mph 12 km/h.
Sunday, September 20, 2026
Mid-Morning
56°F 13°C
Scattered Showers
Mid-Afternoon
65°F 18°C
Partly Cloudy
Early-Evening
62°F 17°C
Partly Cloudy
Cool with a high near 65°F 18°C, scattered downpours possible, with lower humidity and steady pressure. Winds blowing from the SSE at 8 mph 13 km/h.
Monday, September 21, 2026
Mid-Morning
57°F 14°C
Cloudy
Mid-Afternoon
68°F 20°C
Nearby Thunderstorms
Early-Evening
65°F 18°C
Sunny
Mild temperatures up to 68°F 20°C, heavy thunderstorms conditions at times, with lower humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
70°F 21°C
Sunny
Mild with a high of 75°F 24°C, sunny throughout the day, with lower humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
79°F 26°C
Partly Cloudy
Early-Evening
74°F 24°C
Overcast
Pleasant near 79°F 26°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling. Winds turning from the S to the SE at 6 mph 9 km/h.
Thursday, September 24, 2026
Mid-Morning
65°F 18°C
Overcast
Mid-Afternoon
80°F 26°C
Overcast
Early-Evening
70°F 21°C
Sunny
Balmy with temperatures reaching 80°F 26°C, overcast through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds picking up from SW at 9 mph 14 km/h to WSW at 19 mph 30 km/h. Gusts up to 31 mph 49 km/h.
Friday, September 25, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
62°F 17°C
Overcast
Refreshing around 66°F 19°C, sunny in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds tapering down from WSW 31 mph 50 km/h to WSW 13 mph 21 km/h. Gusts up to 20 mph 32 km/h.
Saturday, September 26, 2026
Mid-Morning
56°F 13°C
Overcast
Mid-Afternoon
66°F 19°C
Sunny
Early-Evening
64°F 18°C
Nearby Thunderstorms
Mildly cool near 66°F 19°C, locally heavy thunderstorms at times, with lower humidity and steady pressure.
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