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Rossiter Lake, MT Weather Forecast
Rossiter Lake, MT Weather Forecast Dated: 505 PM Tue Oct 20 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.
Tuesday, October 20, 2026
Mid-Morning
43°F 6°C
Cloudy
Mid-Afternoon
55°F 13°C
Sunny
Early-Evening
47°F 8°C
Sunny
Brisk around 55°F 13°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and steady pressure.
Wednesday, October 21, 2026
Mid-Morning
44°F 7°C
Sunny
Mid-Afternoon
58°F 14°C
Partly Cloudy
Early-Evening
50°F 10°C
Cloudy
Mildly cool near 58°F 14°C, sunny in the morning, cloudy in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure. Winds turning from the SSW to the S at 6 mph 9 km/h.
Thursday, October 22, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
58°F 14°C
Light Showers
Early-Evening
50°F 10°C
Overcast
Comfortable at 58°F 14°C, dry early, with showers developing in the afternoon, with steady humidity and barometric pressure falling. Winds switching from the SSW to the ESE at 4 mph 6 km/h.
Friday, October 23, 2026
Mid-Morning
42°F 6°C
Light Sleet
Mid-Afternoon
36°F 2°C
Heavy Snow
Early-Evening
33°F 1°C
Heavy Snow
Nippy around 36°F 2°C, rounds of sleet expected off and on all day, with increasing humidity and barometric pressure rising. New snow accumulation of 8 to 11 in. 20 to 28 cm.
Saturday, October 24, 2026
Mid-Morning
29°F -2°C
Cloudy
Mid-Afternoon
36°F 2°C
Sunny
Early-Evening
30°F -2°C
Sunny
Biting cold near 36°F 2°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.
Sunday, October 25, 2026
Mid-Morning
27°F -3°C
Sunny
Mid-Afternoon
35°F 2°C
Scattered Showers
Early-Evening
29°F -2°C
Freezing Rain
Cold with a high near 35°F 2°C, locally heavy downpours at times, with steady humidity and steady pressure.
Monday, October 26, 2026
Mid-Morning
19°F -7°C
Light Fog
Mid-Afternoon
31°F 0°C
Cloudy
Early-Evening
22°F -6°C
Partly Cloudy
Freezing near 31°F 0°C, overcast in the morning, cloudy in the afternoon, and partly cloudy this evening, with steady humidity and barometric pressure falling.
Tuesday, October 27, 2026
Mid-Morning
25°F -4°C
Sunny
Mid-Afternoon
40°F 5°C
Sunny
Early-Evening
30°F -2°C
Sunny
Biting cold near 40°F 5°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Wednesday, October 28, 2026
Mid-Morning
25°F -4°C
Overcast
Mid-Afternoon
36°F 2°C
Partly Cloudy
Early-Evening
26°F -3°C
Partly Cloudy
Cold with a high near 36°F 2°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and barometric pressure falling.
Thursday, October 29, 2026
Mid-Morning
29°F -1°C
Sunny
Mid-Afternoon
42°F 6°C
Sunny
Early-Evening
34°F 1°C
Sunny
Nippy around 42°F 6°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Friday, October 30, 2026
Mid-Morning
33°F 1°C
Freezing Rain
Mid-Afternoon
39°F 4°C
Overcast
Early-Evening
33°F 1°C
Partly Cloudy
Biting cold near 39°F 4°C, scattered morning freezing rain before drying out later, with increasing humidity and steady pressure.
Saturday, October 31, 2026
Mid-Morning
28°F -2°C
Overcast
Mid-Afternoon
38°F 4°C
Partly Cloudy
Early-Evening
32°F 0°C
Overcast
Cold with a high near 38°F 4°C, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds SW at 12 mph 19 km/h.
Sunday, November 1, 2026
Mid-Morning
29°F -2°C
Blizzard
Mid-Afternoon
31°F 0°C
Sunny
Early-Evening
26°F -4°C
Cloudy
Freezing near 31°F 0°C, periods of blowing snow, with steady humidity and barometric pressure rising. Winds easing from WSW 13 mph 21 km/h to WSW 5 mph 8 km/h.
Monday, November 2, 2026
Mid-Morning
31°F -1°C
Overcast
Mid-Afternoon
38°F 3°C
Partly Cloudy
Early-Evening
33°F 1°C
Overcast
Biting cold near 38°F 3°C, overcast throughout the day, with steady humidity and steady pressure.
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