Temperature in Montana in September

Daytime highs, nighttime lows and the warmest cities in Montana, the United States of America this September.

Montana, the United States of America, a region in the United States of America, experiences maximum daytime temperatures in September ranging from 19°C (66°F) in Big Sky to 27°C (81°F) in Hardin. Nighttime temperatures generally drop to 8°C (46°F) in Hardin and 3°C (37°F) in Big Sky.

What is the temperature of the different cities in Montana, the United States of America in September?

Discover the typical September temperatures for the most popular locations of Montana on the map below. Detailed insights are just a click away.

Select a Month

Check the conditions for any month of the year.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For a detailed overview over the year and the best time to visit Montana, check out our Montana's climate page.

See also: Montana weather by month.

Best Places to Visit in Montana in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Montana.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in Montana

Montana temperatures in September: frequently asked questions

How hot does it get in Montana, the United States of America in September?

Expect daytime temperatures around 22°C (72°F) in Whitefish. That makes September a pleasant month for Montana, the United States of America.

How cold does it get at night in Montana, the United States of America in September?

Whitefish sees nighttime lows close to 4°C (39°F) in September.

What is the warmest city in September in Montana, the United States of America?

Based on our systematic data collection, Hardin has been identified as the city with the highest average temperatures. The daytime temperature usually hovers around 27°C (81°F), while at night it goes down to an approximate temperature of 8°C (46°F).

What is the coldest city in September in Montana, the United States of America?

Our database indicates that in September, Big Sky is the city with the coolest temperatures in Montana, the United States of America. You can expect daytime highs of 19°C (66°F) and nighttime lows close to 3°C (37°F).

Interested in more climate information?

We have much more information about the climate in Montana.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.

Yellowstone National Park is the crown jewel of America's nature parks

Nature in Yellowstone is overwhelmingly beautiful. It is the largest National Park in America, the oldest national park in the world and one of the most beautiful.
The 7 best ski resorts in the US

Discover top US ski resorts from the Rockies to Alaska. Enjoy snowy peaks, great slopes, and vibrant après-ski. Perfect for winter sports enthusiasts.
Sedona: Explore Majestic Red Rock Landscapes

A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States

Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.
Must visit in the United States of America →