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J Lake, MT Weather Forecast
J Lake, MT Weather Forecast Date: 336 PM MDT Wed Sep 23 2026
The area/counties/county of: Bears Paw Mountains And Southern Blaine, including the city of Rocky Boy.or toggle through each period.
Tonight... Partly cloudy. Lows in the lower 50s. Southwest winds up to 5 mph.
Thursday... Sunny. Highs 77 to 83. South winds up to 10 mph.
Thursday Night... Mostly clear. Lows in the upper 50s. Southeast winds 5 to 15 mph with gusts to around 35 mph.
Friday... Sunny. Highs 80 to 86. Southeast winds 10 to 15 mph with gusts to around 30 mph.
Friday Night... Windy. Partly cloudy. A 20% chance of thunderstorms in the evening. Lows in the lower 50s. South winds 15 to 25 mph with gusts to around 40 mph shifting to the west 15 to 30 mph with gusts to around 50 mph after midnight.
Saturday... Breezy, cooler, sunny. Highs 61 to 67.
Saturday Night... Partly cloudy. Lows in the lower 40s.
Sunday... Partly sunny. Highs 61 to 67.
Sunday Night... Mostly cloudy. A 20% chance of rain. Lows in the mid 40s. Highs 58 to 64.
Monday... Mostly cloudy. A 20% chance of rain. Lows in the mid 40s. Highs 58 to 64.
Monday Night... Partly cloudy. Lows in the lower 40s. Highs 59 to 68.
Tuesday... Partly cloudy. Lows in the lower 40s. Highs 59 to 68.
POP = Probability of Precipitation
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