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Arch Lake, MT Weather Forecast
Arch Lake, MT Weather Forecast Dated: 1006 PM Wed Nov 04 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.
Wednesday, November 4, 2026
Mid-Morning
34°F 1°C
Sunny
Mid-Afternoon
37°F 3°C
Sunny
Early-Evening
37°F 3°C
Clear
Nippy around 37°F 3°C, sunny throughout the day, with increasing humidity and steady pressure.
Thursday, November 5, 2026
Mid-Morning
29°F -2°C
Sunny
Mid-Afternoon
33°F 0°C
Overcast
Early-Evening
26°F -4°C
Overcast
Biting cold near 33°F 0°C, sunny in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds out of the SW at 7 mph 11 km/h.
Friday, November 6, 2026
Mid-Morning
23°F -5°C
Sunny
Mid-Afternoon
31°F 0°C
Sunny
Early-Evening
33°F 1°C
Clear
Frigid with highs around 31°F 0°C, sunny through the afternoon, turning partly cloudy this evening, with increasing humidity and steady pressure. Winds blowing from the SW at 12 mph 19 km/h.
Saturday, November 7, 2026
Mid-Morning
41°F 5°C
Sunny
Mid-Afternoon
39°F 4°C
Cloudy
Early-Evening
42°F 5°C
Overcast
Nippy around 39°F 4°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds moving from the SW to the SSW at 11 mph 18 km/h.
Sunday, November 8, 2026
Mid-Morning
40°F 5°C
Partly Cloudy
Mid-Afternoon
39°F 4°C
Overcast
Early-Evening
40°F 4°C
Overcast
Biting cold near 39°F 4°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds swinging from the SSW to the SW at 13 mph 20 km/h. Gusts up to 20 mph 32 km/h.
Monday, November 9, 2026
Mid-Morning
33°F 1°C
Partly Cloudy
Mid-Afternoon
38°F 3°C
Overcast
Early-Evening
39°F 4°C
Overcast
Cold with a high near 38°F 3°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with increasing humidity and steady pressure. Winds shifting from the SW to the SSW at 7 mph 12 km/h.
Tuesday, November 10, 2026
Mid-Morning
39°F 4°C
Partly Cloudy
Mid-Afternoon
37°F 3°C
Sunny
Early-Evening
39°F 4°C
Partly Cloudy
Nippy around 37°F 3°C, partly cloudy throughout the day, with steady humidity and steady pressure.
Wednesday, November 11, 2026
Mid-Morning
39°F 4°C
Partly Cloudy
Mid-Afternoon
41°F 5°C
Partly Cloudy
Early-Evening
42°F 6°C
Partly Cloudy
Biting cold near 41°F 5°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure.
Thursday, November 12, 2026
Mid-Morning
39°F 4°C
Partly Cloudy
Mid-Afternoon
37°F 3°C
Partly Cloudy
Early-Evening
35°F 2°C
Partly Cloudy
Cold with a high near 37°F 3°C, cloudy throughout the day, with increasing humidity and steady pressure. Winds SSW at 7 mph 11 km/h. Gusts up to 22 mph 36 km/h.
Friday, November 13, 2026
Mid-Morning
30°F -1°C
Partly Cloudy
Mid-Afternoon
32°F 0°C
Sunny
Early-Evening
28°F -2°C
Freezing Rain
Nippy around 32°F 0°C, drier conditions through late afternoon before freezing rain move in, with increasing humidity and steady pressure. Winds out of the SW at 9 mph 14 km/h. Gusts up to 26 mph 43 km/h.
Saturday, November 14, 2026
Mid-Morning
29°F -2°C
Snow
Mid-Afternoon
28°F -2°C
Freezing Rain
Early-Evening
24°F -5°C
Light Snow
Freezing temperatures near 28°F -2°C, persistent snow off and on through the day, with increasing humidity and steady pressure. Winds blowing from the SW at 8 mph 13 km/h. Gusts up to 26 mph 42 km/h.
Sunday, November 15, 2026
Mid-Morning
26°F -3°C
Overcast
Mid-Afternoon
26°F -3°C
Cloudy
Early-Evening
20°F -7°C
Cloudy
Frigid with highs around 26°F -3°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with increasing humidity and steady pressure. Winds swinging from the SSW to the SSE at 2 mph 3 km/h. Gusts up to 21 mph 34 km/h.
Monday, November 16, 2026
Mid-Morning
20°F -7°C
Heavy Snow
Mid-Afternoon
19°F -7°C
Light Snow
Early-Evening
16°F -9°C
Light Snow
Freezing near 19°F -7°C, rounds of snow expected off and on all day, with steady humidity and barometric pressure rising. Snow accumulation up to 2 in. up to 5 cm.
Tuesday, November 17, 2026
Mid-Morning
23°F -5°C
Light Snow
Mid-Afternoon
17°F -9°C
Snow
Early-Evening
12°F -11°C
Light Snow
Freezing temperatures near 17°F -9°C, persistent snow off and on through the day, with increasing humidity and steady pressure.
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