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Boulder, MT Weather Forecast
Boulder, MT Weather Forecast Date: 1046 PM MDT Sat Sep 12 2026
The area/counties/county of: Elkhorn And Boulder Mountains, including the cities of: Montana City, Clancy, Boulder, Corbin, Wickes, Elk Park Pass, and Homestake Pass.or toggle through each period.
Rest of Tonight... Partly cloudy. Lows 35 to 43. Northeast winds up to 10 mph with gusts to around 25 mph.
Sunday... Mostly sunny. A 20% chance of rain showers in the afternoon. Highs 60 to 70. Southeast winds up to 10 mph shifting to the west with gusts to around 30 mph in the afternoon.
Sunday Night... Mostly cloudy. Chance of rain showers in the evening, then slight chance of rain showers after midnight. Lows 33 to 41. West winds 5 to 15 mph with gusts to around 40 mph. Chance of showers 50%.
Monday... Partly sunny. Highs 48 to 58. West winds 15 to 20 mph with gusts to around 45 mph.
Monday Night... Mostly clear. Lows 31 to 39. Northwest winds 5 to 15 mph with gusts to around 30 mph shifting to the west up to 5 mph after midnight.
Tuesday... Not as cool. Mostly sunny. Highs 54 to 64.
Tuesday Night... Partly cloudy in the evening, then mostly cloudy with a 20% chance of rain showers after midnight. Lows 35 to 43.
Wednesday... Mostly sunny. Highs 53 to 61.
Wednesday Night... Mostly clear. Lows 35 to 46. Highs 61 to 71.
Thursday... Mostly clear. Lows 35 to 46. Highs 61 to 71.
Friday... Sunny with a 20% chance of rain showers. Highs 63 to 71.
Friday Night... Mostly clear. Lows 41 to 47. Highs 65 to 73.
POP = Probability of Precipitation
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