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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Civic Maple Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above before heading out, then plan for Montana’s mix of mountain storms, plains wind, and big temperature swings—summer can hit 38°C, winter can drop below -34°C, especially in the Rockies.
What makes Montana’s weather so changeable?
Montana sits in the path of Pacific storms that collide with the Rocky Mountains, creating rapid shifts. Western valleys get more rain and snow, while the east stays drier and windier. Chinook winds often warm up areas like Bozeman in winter, but the state can see snow any month above 1,500 metres.
What is Montana weather year round?
Summers are short and warm, especially July and August, with highs of 26–32°C. Autumn brings crisp air and early snow in the mountains. Winters are cold and snowy, particularly in the west. Spring is unpredictable—snow can fall in April, then melt into mud. Monthly averages vary widely: January lows near −9°C in Bozeman, July highs near 30°C. Check a Montana weather monthly chart to see the pattern.
Which microclimates matter most for travel?
Bozeman sits in the Gallatin Valley, where weather changes fast—sudden thunderstorms in summer and chinook winds in winter can melt 30 cm of snow in a day. Northwestern Montana (Glacier Park) is wetter and cooler. The eastern plains (near Miles City) are drier and hotter in summer, colder in winter. For a Montana weather map 10 day, look at satellite loops that show cloud bands moving over the divide.
Does Montana get snow in November?
Yes, especially in the western half. Bozeman averages 33 cm of snow in November. Highs hover around 6°C, lows near −6°C. The eastern plains see less November snow, usually only 5–15 cm.
What’s the best month for mild weather in Montana?
September typically offers the most comfortable conditions statewide: average highs 23–27°C, low humidity, fewer thunderstorms. It’s a sweet spot between summer heat and winter snow, especially around Bozeman.
How reliable is a 14 day forecast for Montana?
A Montana weather 14 day forecast gives general trends but details often change after day 7. Mountains and plains can differ by 10°C or more in a single day. For short trips, trust the outlook 3–5 days ahead.
For more on Canadian weather comparisons, see our Canada weather hub or check Calgary Weather for a similar Rocky Mountain pattern. If you’re planning a longer stay, a Weather 10 Days page helps you track shifts.