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Boulder, MT Climate

1991 to 2020 normals at Boulder, 0.6 mi from the center of Boulder, elevation 4904 ft.

Average weather by month

Select a month for daily normals and last year's weather

MonthRangeHighLowPrecip.Snow
January35°12°0.28 in--
February38°14°0.19 in--
March47°21°0.40 in--
April55°27°0.78 in--
May64°35°1.86 in--
June72°43°2.30 in--
July83°48°1.38 in--
August82°46°1.12 in--
September72°38°1.10 in--
October57°28°0.64 in--
November42°19°0.48 in--
December34°12°0.27 in--
Year57°10.80 in--

Frequently asked questions

What is the hottest month in Boulder, MT?
July is the warmest month, with a normal high of 83°F at Boulder.
What is the coldest month in Boulder, MT?
December is the coldest month, with a normal low of 12°F.
What is the wettest month in Boulder, MT?
June has the most precipitation on average, about 2.30 inches.