Big Spring Lake, MT 14 Day Weather
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Big Spring Lake, MT Weather Forecast


Big Spring Lake, MT Weather Forecast Dated: 637 PM Tue Sep 22 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.
Tuesday, September 22, 2026
Mid-Morning
55°F 13°C
Cloudy
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
62°F 17°C
Overcast
Pleasant near 72°F 22°C, cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds out of the W at 8 mph 13 km/h.
Wednesday, September 23, 2026
Mid-Morning
53°F 12°C
Sunny
Mid-Afternoon
68°F 20°C
Overcast
Early-Evening
59°F 15°C
Overcast
Comfortable with temperatures reaching 68°F 20°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the WSW to the SW at 11 mph 18 km/h. Gusts up to 21 mph 33 km/h.
Thursday, September 24, 2026
Mid-Morning
55°F 13°C
Partly Cloudy
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
67°F 20°C
Sunny
Enjoyable around 76°F 25°C, cloudy in the morning, sunny in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling. Winds moving from the WSW to the SW at 5 mph 8 km/h.
Friday, September 25, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
67°F 19°C
Overcast
Early-Evening
53°F 12°C
Partly Cloudy
Cool with a high near 67°F 19°C, overcast through the afternoon, turning partly cloudy this evening, with increasing humidity and barometric pressure rising. Winds swinging from the S to the SW at 13 mph 21 km/h. Gusts up to 28 mph 45 km/h.
Saturday, September 26, 2026
Mid-Morning
41°F 5°C
Sunny
Mid-Afternoon
50°F 10°C
Sunny
Early-Evening
47°F 9°C
Sunny
Brisk around 50°F 10°C, sunny throughout the day, with lower humidity and barometric pressure rising. Winds tapering down from WSW 28 mph 45 km/h to WSW 9 mph 14 km/h.
Sunday, September 27, 2026
Mid-Morning
42°F 5°C
Overcast
Mid-Afternoon
57°F 14°C
Overcast
Early-Evening
51°F 11°C
Overcast
Cool and brisk at 57°F 14°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds turning from the S to the SW at 5 mph 8 km/h.
Monday, September 28, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
54°F 12°C
Partly Cloudy
Comfortable at 61°F 16°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure.
Tuesday, September 29, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
55°F 13°C
Overcast
Cool with a high near 63°F 17°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds out of the SW at 11 mph 17 km/h.
Wednesday, September 30, 2026
Mid-Morning
47°F 8°C
Overcast
Mid-Afternoon
66°F 19°C
Cloudy
Early-Evening
57°F 14°C
Overcast
Refreshing around 66°F 19°C, overcast throughout the day, with lower humidity and steady pressure. Winds moving from the WSW to the W at 9 mph 15 km/h.
Thursday, October 1, 2026
Mid-Morning
47°F 9°C
Partly Cloudy
Mid-Afternoon
50°F 10°C
Scattered Showers
Early-Evening
42°F 5°C
Overcast
Cool and brisk at 50°F 10°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure rising. Winds increasing from the WSW at 6 mph 9 km/h to WSW at 15 mph 24 km/h. Gusts up to 40 mph 64 km/h.
Friday, October 2, 2026
Mid-Morning
38°F 4°C
Sunny
Mid-Afternoon
48°F 9°C
Sunny
Early-Evening
41°F 5°C
Partly Cloudy
Chilly near 48°F 9°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds out of the WSW at 13 mph 21 km/h.
Saturday, October 3, 2026
Mid-Morning
36°F 2°C
Sunny
Mid-Afternoon
53°F 12°C
Overcast
Early-Evening
45°F 7°C
Overcast
Crisp with a high near 53°F 12°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling. Winds blowing from the SW at 8 mph 12 km/h.
Sunday, October 4, 2026
Mid-Morning
40°F 5°C
Overcast
Mid-Afternoon
58°F 15°C
Cloudy
Early-Evening
52°F 11°C
Overcast
Refreshing around 58°F 15°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds WSW at 14 mph 23 km/h.
Monday, October 5, 2026
Mid-Morning
50°F 10°C
Cloudy
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
59°F 15°C
Sunny
Mild temperatures up to 73°F 23°C, cloudy in the morning, overcast in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds picking up from WSW at 9 mph 15 km/h to WSW at 18 mph 30 km/h. Gusts up to 41 mph 66 km/h.
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