Boulder Lake, MT 14 Day Weather
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Boulder Lake, MT Weather Forecast


Boulder Lake, MT Weather Forecast Dated: 1258 AM Thu Sep 17 2026
Expect a cool pattern with plenty of sunshine and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Thursday, September 17, 2026
Mid-Morning
53°F 12°C
Partly Cloudy
Mid-Afternoon
76°F 24°C
Sunny
Early-Evening
61°F 16°C
Sunny
Pleasant near 76°F 24°C, partly cloudy in the morning, sunny in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling.
Friday, September 18, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
60°F 15°C
Nearby Thunderstorms
Comfortable with temperatures reaching 70°F 21°C, locally heavy thunderstorms at times, with lower humidity and steady pressure.
Saturday, September 19, 2026
Mid-Morning
53°F 12°C
Cloudy
Mid-Afternoon
69°F 20°C
Sunny
Early-Evening
63°F 17°C
Partly Cloudy
Enjoyable around 69°F 20°C, cloudy in the morning, sunny in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling.
Sunday, September 20, 2026
Mid-Morning
53°F 11°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
64°F 17°C
Sunny
Mild temperatures up to 72°F 22°C, sunny throughout the day, with lower humidity and barometric pressure falling.
Monday, September 21, 2026
Mid-Morning
52°F 11°C
Overcast
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
59°F 15°C
Sunny
Mild with a high of 72°F 22°C, overcast through the afternoon, turning sunny this evening, with steady humidity and barometric pressure falling. Winds turning from the SSE to the WSW at 10 mph 15 km/h.
Tuesday, September 22, 2026
Mid-Morning
43°F 6°C
Sunny
Mid-Afternoon
57°F 14°C
Sunny
Early-Evening
51°F 11°C
Sunny
Cool and brisk at 57°F 14°C, sunny throughout the day, with lower humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
44°F 7°C
Sunny
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
61°F 16°C
Overcast
Comfortable at 66°F 19°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling.
Thursday, September 24, 2026
Mid-Morning
53°F 11°C
Sunny
Mid-Afternoon
75°F 24°C
Partly Cloudy
Early-Evening
66°F 19°C
Sunny
Enjoyable around 75°F 24°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling.
Friday, September 25, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
70°F 21°C
Partly Cloudy
Warm temperatures up to 80°F 27°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling.
Saturday, September 26, 2026
Mid-Morning
59°F 15°C
Partly Cloudy
Mid-Afternoon
74°F 23°C
Overcast
Early-Evening
60°F 15°C
Scattered Showers
Mild with a high of 74°F 23°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds switching from the SSE to the W at 2 mph 4 km/h.
Sunday, September 27, 2026
Mid-Morning
48°F 9°C
Cloudy
Mid-Afternoon
58°F 15°C
Sunny
Early-Evening
49°F 10°C
Sunny
Comfortable at 58°F 15°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the WSW to the N at 6 mph 11 km/h.
Monday, September 28, 2026
Mid-Morning
40°F 4°C
Partly Cloudy
Mid-Afternoon
54°F 12°C
Partly Cloudy
Early-Evening
45°F 8°C
Overcast
Crisp with a high near 54°F 12°C, partly cloudy through the afternoon, turning overcast this evening, with lower humidity and steady pressure.
Tuesday, September 29, 2026
Mid-Morning
38°F 3°C
Sunny
Mid-Afternoon
58°F 14°C
Overcast
Early-Evening
48°F 9°C
Overcast
Refreshing around 58°F 14°C, sunny in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling.
Wednesday, September 30, 2026
Mid-Morning
41°F 5°C
Sunny
Mid-Afternoon
59°F 15°C
Sunny
Early-Evening
51°F 11°C
Overcast
Mildly cool near 59°F 15°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.
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