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Flagstaff Reservoir, MT Weather Forecast
Flagstaff Reservoir, MT Weather Forecast Date: 336 PM MDT Sat Aug 22 2026
The area/counties/county of: Meagher County Valleys, including the cities of: Martinsdale, Checkerboard, Ringling, and White Sulphur Springs.or toggle through each period.
Tonight... Mostly cloudy. Chance of thunderstorms early in the evening, then slight chance of rain showers late in the evening. Lows in the mid 50s. South winds up to 10 mph. Chance of precipitation 50%.
Sunday... Partly sunny. A 20% chance of thunderstorms in the afternoon. Highs in the lower 80s. South winds up to 10 mph with gusts to around 30 mph increasing to southwest 10 to 20 mph with gusts to around 40 mph in the afternoon.
Sunday Night... Mostly clear. Lows 45 to 51. Northwest winds 5 to 15 mph with gusts to around 35 mph shifting to the west up to 5 mph with gusts to around 20 mph after midnight.
Monday... Sunny. Highs in the upper 70s. West winds up to 10 mph with gusts to around 25 mph.
Monday Night... Partly cloudy. Lows in the upper 40s. North winds up to 10 mph with gusts to around 25 mph shifting to the east after midnight.
Tuesday... Sunny. Highs around 80.
Tuesday Night... Partly cloudy. Lows in the lower 50s. Highs in the lower 80s.
Wednesday... Partly cloudy. Lows in the lower 50s. Highs in the lower 80s.
Wednesday Night... Partly cloudy with a 20% chance of thunderstorms in the evening, then mostly cloudy after midnight. Lows in the lower 50s.
Thursday... Partly cloudy. A 20% chance of rain showers. Highs in the lower 80s. Lows around 50.
Thursday Night... Partly cloudy. A 20% chance of rain showers. Highs in the lower 80s. Lows around 50.
Friday... Sunny. Highs in the upper 70s.
Friday Night... Partly cloudy. Lows in the upper 40s.
POP = Probability of Precipitation
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