Great Falls weather in September (Montana, United States of America)

What should you pack for a trip to Great Falls in September? Find out what kind of weather to expect during this month.

Temperatures

During September, Great Falls is known for its perfect weather, characterized by high temperatures and moderate rainfall. Daytime temperatures hover around 23°C, while nights can cool down to about 7°C.

Precipitation

Great Falls in September usually receives moderate rainfall, averaging around 35 mm for the month. Looking at the last 30 years, the data shows about 7 days with rain.

Average sunshine

The city usually sees around 255 hours of sunlight, indicating many sunny days.

So this is a great month to visit if you prefer dry days with pleasant temperatures. June, July, August and September typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Great Falls climate page with graphs.

 

Great Falls, monthly averages in September

Min Temperature 7°C  

Max Temperature 23°C  

Chance of Rain 23%  

Precipitation 35 mm  

Rainy days 7 days  

Humidity 43%  

Windspeed 14 km/h  

Sunshine 255 hours  

Percentage Sunshine  

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Great Falls, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

5/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Great Falls.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find 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.