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Acton, MT Weather Forecast


Acton, MT Weather Forecast Dated: 246 AM Wed Sep 09 2026
Expect a cool pattern with more clouds than sun and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 9, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
82°F 28°C
Partly Cloudy
Early-Evening
73°F 23°C
Sunny
Warm and summery near 82°F 28°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds turning from the WSW to the NNE at 9 mph 15 km/h.
Thursday, September 10, 2026
Mid-Morning
67°F 20°C
Overcast
Mid-Afternoon
89°F 31°C
Sunny
Early-Evening
81°F 28°C
Sunny
Balmy with temperatures reaching 89°F 31°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling. Winds switching from the WSW to the SW at 9 mph 14 km/h.
Friday, September 11, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
74°F 24°C
Sunny
Early-Evening
61°F 16°C
Overcast
Enjoyable around 74°F 24°C, overcast in the morning, sunny in the afternoon, and cloudy this evening, with steady humidity and barometric pressure rising. Winds moving from the WNW to the ENE at 19 mph 30 km/h. Gusts up to 25 mph 40 km/h.
Saturday, September 12, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
62°F 17°C
Scattered Showers
Cool with a high near 66°F 19°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds swinging from the ENE to the NE at 15 mph 24 km/h. Gusts up to 21 mph 33 km/h.
Sunday, September 13, 2026
Mid-Morning
52°F 11°C
Overcast
Mid-Afternoon
52°F 11°C
Light Rain
Early-Evening
49°F 10°C
Light Showers
Brisk around 52°F 11°C, clouds and showers taking over for the afternoon and evening, with increasing humidity and barometric pressure rising. Winds shifting from the ENE to the N at 13 mph 20 km/h.
Monday, September 14, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
69°F 21°C
Sunny
Early-Evening
65°F 18°C
Sunny
Pleasant near 69°F 21°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and barometric pressure falling. Winds turning from the SSW to the ESE at 6 mph 9 km/h.
Tuesday, September 15, 2026
Mid-Morning
58°F 14°C
Overcast
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
69°F 20°C
Sunny
Comfortable with temperatures reaching 75°F 24°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds picking up from NW at 3 mph 4 km/h to N at 11 mph 16 km/h.
Wednesday, September 16, 2026
Mid-Morning
60°F 16°C
Partly Cloudy
Mid-Afternoon
76°F 24°C
Overcast
Early-Evening
72°F 22°C
Overcast
Enjoyable around 76°F 24°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling. Winds moving from the NW to the NE at 11 mph 18 km/h.
Thursday, September 17, 2026
Mid-Morning
53°F 12°C
Scattered Showers
Mid-Afternoon
48°F 9°C
Scattered Showers
Early-Evening
47°F 8°C
Overcast
Brisk around 48°F 9°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds NE at 13 mph 20 km/h.
Friday, September 18, 2026
Mid-Morning
48°F 9°C
Scattered Showers
Mid-Afternoon
59°F 15°C
Overcast
Early-Evening
58°F 15°C
Overcast
Mildly cool near 59°F 15°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds picking up from NNE at 4 mph 7 km/h to NE at 13 mph 20 km/h.
Saturday, September 19, 2026
Mid-Morning
52°F 11°C
Light Showers
Mid-Afternoon
56°F 13°C
Scattered Showers
Early-Evening
50°F 10°C
Scattered Showers
Chilly near 56°F 13°C, scattered downpours possible, with lower humidity and steady pressure. Winds turning from the N to the NE at 13 mph 20 km/h.
Sunday, September 20, 2026
Mid-Morning
41°F 5°C
Scattered Showers
Mid-Afternoon
47°F 9°C
Partly Cloudy
Early-Evening
48°F 9°C
Overcast
Crisp with a high near 47°F 9°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds ENE at 8 mph 13 km/h.
Monday, September 21, 2026
Mid-Morning
42°F 6°C
Overcast
Mid-Afternoon
61°F 16°C
Cloudy
Early-Evening
58°F 14°C
Overcast
Refreshing around 61°F 16°C, overcast in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling. Winds picking up from NE at 1 mph 2 km/h to NE at 13 mph 20 km/h. Gusts up to 21 mph 33 km/h.
Tuesday, September 22, 2026
Mid-Morning
49°F 10°C
Overcast
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
60°F 16°C
Partly Cloudy
Mildly cool near 63°F 17°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds swinging from the S to the E at 8 mph 12 km/h.
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