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Potomac, MT Weather Forecast
Potomac, MT Weather Forecast Dated: 206 AM Thu Sep 10 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.
Thursday, September 10, 2026
Mid-Morning
56°F 13°C
Sunny
Mid-Afternoon
71°F 22°C
Cloudy
Early-Evening
63°F 17°C
Overcast
Pleasant near 71°F 22°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling. Winds picking up from SSW at 3 mph 5 km/h to W at 11 mph 17 km/h. Gusts up to 25 mph 40 km/h.
Friday, September 11, 2026
Mid-Morning
51°F 11°C
Overcast
Mid-Afternoon
62°F 17°C
Sunny
Early-Evening
53°F 12°C
Overcast
Mildly cool near 62°F 17°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds switching from the WSW to the NE at 5 mph 8 km/h.
Saturday, September 12, 2026
Mid-Morning
43°F 6°C
Overcast
Mid-Afternoon
50°F 10°C
Overcast
Early-Evening
46°F 8°C
Overcast
Chilly near 50°F 10°C, overcast throughout the day, with steady humidity and steady pressure. Winds ENE at 6 mph 10 km/h.
Sunday, September 13, 2026
Mid-Morning
36°F 2°C
Light Rain
Mid-Afternoon
42°F 5°C
Light Showers
Early-Evening
39°F 4°C
Fog
Nippy around 42°F 5°C, intermittent showers through midday, easing by evening, with steady humidity and barometric pressure rising.
Monday, September 14, 2026
Mid-Morning
37°F 3°C
Partly Cloudy
Mid-Afternoon
54°F 12°C
Sunny
Early-Evening
48°F 9°C
Sunny
Brisk around 54°F 12°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling.
Tuesday, September 15, 2026
Mid-Morning
44°F 7°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
51°F 10°C
Overcast
Mildly cool near 63°F 17°C, sunny through the afternoon, turning overcast this evening, with steady humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
39°F 4°C
Partly Cloudy
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
50°F 11°C
Sunny
Comfortable at 61°F 16°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
44°F 6°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
60°F 16°C
Sunny
Enjoyable around 70°F 21°C, sunny throughout the day, with lower humidity and barometric pressure falling.
Friday, September 18, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
78°F 25°C
Sunny
Early-Evening
67°F 20°C
Sunny
Mild temperatures up to 78°F 25°C, sunny throughout the day, with lower humidity and barometric pressure falling.
Saturday, September 19, 2026
Mid-Morning
56°F 13°C
Sunny
Mid-Afternoon
76°F 25°C
Nearby Thunderstorms
Early-Evening
59°F 15°C
Sunny
Mild with a high of 76°F 25°C, periods of heavy thunderstorms, with steady humidity and steady pressure. Winds swinging from the ESE to the WNW at 8 mph 12 km/h.
Sunday, September 20, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
56°F 13°C
Sunny
Early-Evening
49°F 9°C
Cloudy
Chilly near 56°F 13°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds shifting from the WSW to the W at 7 mph 11 km/h.
Monday, September 21, 2026
Mid-Morning
45°F 7°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
55°F 13°C
Sunny
Cool with a high near 63°F 17°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
49°F 9°C
Overcast
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
62°F 17°C
Overcast
Enjoyable around 71°F 22°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling.
Wednesday, September 23, 2026
Mid-Morning
53°F 12°C
Sunny
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
65°F 18°C
Sunny
Mild temperatures up to 75°F 24°C, sunny throughout the day, with lower humidity and barometric pressure falling.
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