Weather WorldLake Sylvan, MT 14 Day Weather
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Lake Sylvan, MT Weather Forecast
Lake Sylvan, MT Weather Forecast Dated: 301 PM Sun Oct 18 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.
Sunday, October 18, 2026
Mid-Morning
40°F 4°C
Overcast
Mid-Afternoon
45°F 7°C
Sunny
Early-Evening
43°F 6°C
Partly Cloudy
Brisk around 45°F 7°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.
Monday, October 19, 2026
Mid-Morning
43°F 6°C
Sunny
Mid-Afternoon
47°F 8°C
Sunny
Early-Evening
48°F 9°C
Partly Cloudy
Cool and brisk at 47°F 8°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the SW at 6 mph 10 km/h.
Tuesday, October 20, 2026
Mid-Morning
38°F 3°C
Sunny
Mid-Afternoon
44°F 7°C
Scattered Showers
Early-Evening
43°F 6°C
Partly Cloudy
Cold with a high near 44°F 7°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds switching from the SW to the SSW at 4 mph 7 km/h.
Wednesday, October 21, 2026
Mid-Morning
41°F 5°C
Partly Cloudy
Mid-Afternoon
47°F 9°C
Sunny
Early-Evening
47°F 8°C
Sunny
Crisp with a high near 47°F 9°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds SW at 8 mph 13 km/h.
Thursday, October 22, 2026
Mid-Morning
47°F 8°C
Sunny
Mid-Afternoon
49°F 10°C
Partly Cloudy
Early-Evening
50°F 11°C
Overcast
Brisk around 49°F 10°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling.
Friday, October 23, 2026
Mid-Morning
38°F 4°C
Overcast
Mid-Afternoon
33°F 1°C
Heavy Snow & Thunder
Early-Evening
28°F -2°C
Heavy Snow & Thunder
Cold with a high near 33°F 1°C, dry early, with snow continuing through afternoon and evening, with increasing humidity and barometric pressure rising. New snow accumulation of 2 to 5 in. 5 to 13 cm.
Saturday, October 24, 2026
Mid-Morning
24°F -5°C
Sunny
Mid-Afternoon
29°F -2°C
Sunny
Early-Evening
32°F 1°C
Sunny
Freezing near 29°F -2°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds swinging from the SW to the SSW at 12 mph 19 km/h.
Sunday, October 25, 2026
Mid-Morning
36°F 2°C
Sunny
Mid-Afternoon
34°F 1°C
Sunny
Early-Evening
36°F 2°C
Sunny
Biting cold near 34°F 1°C, sunny throughout the day, with increasing humidity and steady pressure. Winds blowing from the SW at 11 mph 17 km/h.
Monday, October 26, 2026
Mid-Morning
37°F 3°C
Sunny
Mid-Afternoon
36°F 2°C
Partly Cloudy
Early-Evening
37°F 3°C
Cloudy
Cold with a high near 36°F 2°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with increasing humidity and steady pressure.
Tuesday, October 27, 2026
Mid-Morning
44°F 6°C
Overcast
Mid-Afternoon
42°F 6°C
Overcast
Early-Evening
42°F 6°C
Cloudy
Nippy around 42°F 6°C, overcast through the afternoon, turning cloudy this evening, with increasing humidity and barometric pressure falling. Winds turning from the SSW to the S at 6 mph 9 km/h.
Wednesday, October 28, 2026
Mid-Morning
21°F -6°C
Scattered Snow Showers
Mid-Afternoon
22°F -5°C
Blowing Snow
Early-Evening
17°F -9°C
Patchy Moderate Snow
Freezing temperatures near 22°F -5°C, patchy blowing snow and gusty conditions, with steady humidity and steady pressure. Winds out of the WSW at 17 mph 27 km/h. Gusts up to 27 mph 44 km/h.
Thursday, October 29, 2026
Mid-Morning
26°F -3°C
Sunny
Mid-Afternoon
29°F -2°C
Partly Cloudy
Early-Evening
32°F 0°C
Sunny
Frigid with highs around 29°F -2°C, sunny in the morning, cloudy in the afternoon, and sunny this evening, with increasing humidity and steady pressure. Winds moving from the SW to the SSW at 5 mph 8 km/h.
Friday, October 30, 2026
Mid-Morning
37°F 3°C
Sunny
Mid-Afternoon
39°F 4°C
Sunny
Early-Evening
39°F 4°C
Sunny
Nippy around 39°F 4°C, sunny throughout the day, with increasing humidity and steady pressure. Winds WSW at 4 mph 6 km/h.
Saturday, October 31, 2026
Mid-Morning
35°F 2°C
Sunny
Mid-Afternoon
31°F 0°C
Partly Cloudy
Early-Evening
22°F -6°C
Overcast
Freezing temperatures near 31°F 0°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with increasing humidity and barometric pressure rising.
Lake Sylvan, MT Weather Radar Map
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