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Lake Adam Upper Reservoir, MT Weather Forecast
Lake Adam Upper Reservoir, MT Weather Forecast Date: 648 PM MDT Wed Aug 05 2026
The area/counties/county of: Northern Sweet Grass, including the city of Big Timber.or toggle through each period.
Tonight... Mostly clear. Patchy smoke in the evening and overnight, then areas of smoke after 3 am. Lows in the lower 50s. West winds 5 to 10 mph.
Thursday... Sunny. Areas of smoke in the morning, then patchy smoke in the afternoon. Highs in the lower 90s. West winds 10 to 20 mph.
Thursday Night... Increasing clouds. Patchy smoke early in the evening, then areas of smoke in the late evening and overnight. Patchy smoke after 3 am. Lows in the mid 50s. North winds 5 to 10 mph.
Friday... Sunny. Patchy smoke early in the morning. Highs in the mid 90s. West winds 5 to 10 mph.
Friday Night... Mostly clear. Lows in the upper 50s. Northwest winds 5 to 10 mph.
Saturday... Sunny. Highs in the upper 90s.
Saturday Night... Mostly clear. Lows around 60.
Sunday... Sunny. Highs in the mid 90s.
Sunday Night... Mostly clear. Lows in the upper 50s.
Monday... Sunny. Highs in the lower 90s.
Monday Night... Mostly clear. Lows around 60.
Tuesday... Sunny. Highs in the lower 90s.
Tuesday Night... Partly cloudy. Lows around 60.
POP = Probability of Precipitation
Lake Adam Upper Reservoir Radar Loop
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