Weather in Montana in september 2025

The weather in Montana in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.

Average weather throughout september

tolerable weather 220.9cm

Weather at 6am
43°F

Partly Cloudy

21%

Moderate rain at times

9%

Snow showers

7%

Weather at 12pm
63°F

Partly Cloudy

26%

Moderate rain at times

8%

Moderate or heavy rain in area with thunder

6%

Weather at 6pm
61°F

Partly Cloudy

22%

Moderate rain at times

9%

Heavy rain

6%

Weather at 3am
45°F

Clear/Sunny

55%

Partly Cloudy

23%

Moderate rain at times

11%

Snow showers

7%



Evolution of daily average temperature and precipitation in Montana in september

These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Montana in september.


The climate of Montana in september is tolerable

The climate in september in Montana is relatively dry (with 3.2in of precipitation over 4 days). This is better than the previous month since in august it receives an average of 4.4in of rainfall over 7 days.

The climate is rather cold in that locality this month, but it is tolerable by dressing warm. The high seasonal norm is 65°F. The minimum is 43°F. Thus, the mean temperature average on this month of september in Montana is 54°F. Note that these seasonal averages are in contrast with those observed in Montana in the month of september with a maximum record of 86°F in 2013 and a minimum record of 11°F in 2019. You can hope to have about 17 days with temperatures over 65°F, or 57% of the month.

On this month of september, day length in Montana is generally 12:32. Sunrise is at 06:00 and sets at 18:32.

With a good weather, the month of september is a good month to go in that area in United States.



Montana: another month?

If you can push the dates of your trip to Montana forward, the month of october has a better weather forecast than september. more information

September: another location in the United States (USA)?

If you want to go to the United States (USA) in september, there are destinations with better weather than Montana:

In september, Grand Canyon, Hawaii (Honolulu), Las Vegas, Seattle, Denver and Minneapolis (Minnesota) have perfect weather.

Furthermore, California, Louisiana, Washington D. C., Atlanta, Boston and Chicago have good weather.

more information about United States's weather in september


Seasonal average climate and temperature of Montana in september

Check below seasonal norms These statistics are set from the weather statements earlier years of september.

September
Outside temperature
Average temperature 54°F
Highest temperature 65°F
Lowest temperature 43°F
Highest record temperature 86°F
(2013)
Lowest record temperature 11°F
(2019)
Number of days at +86°F 0 day(s)
(0%)
Number of days at +65°F 17 day(s)
(57%)
Number of days at -32°F 3 day(s)
(10%)
Wind
Wind speed 18km/h
Wind temperature 40°F
Precipitation (rainfall)
Rainfall 3.2in
Number of days with rainfall 4 day(s)
(15%)
Record daily rainfall 1.8in
(2017)
Snowfall 220.9cm
Other climate data
Humidity 71%
Visibility 9.3km
Cloud cover 24%
UV index 4
Daily sunshine hours 12
Sunrise and sunset
Time of sunrise 06:00
Time of sunset 18:32
Length of day 12:32
Our opinion about the weather in september
Our opinion at whereandwhen.net tolerable



How was the weather last september?

Here is the day by day recorded weather in Montana in september 2024:

01-09-2024
Clear/Sunny
50°F to 85°F
02-09-2024
Clear/Sunny
59°F to 85°F
03-09-2024
Clear/Sunny
58°F to 76°F
04-09-2024
Patchy rain nearby
52°F to 68°F
05-09-2024
Clear/Sunny
47°F to 79°F
06-09-2024
Clear/Sunny
52°F to 83°F
07-09-2024
Clear/Sunny
56°F to 85°F
08-09-2024
Clear/Sunny
56°F to 85°F
09-09-2024
Clear/Sunny
58°F to 79°F
10-09-2024
Overcast
56°F to 77°F
11-09-2024
Clear/Sunny
54°F to 70°F
12-09-2024
Patchy rain nearby
50°F to 58°F
13-09-2024
Partly Cloudy
45°F to 58°F
14-09-2024
Clear/Sunny
49°F to 70°F
15-09-2024
Clear/Sunny
49°F to 74°F
16-09-2024
Partly Cloudy
52°F to 76°F
17-09-2024
Clear/Sunny
54°F to 68°F
18-09-2024
Moderate rain
45°F to 49°F
19-09-2024
Clear/Sunny
41°F to 67°F
20-09-2024
Clear/Sunny
43°F to 65°F
21-09-2024
Clear/Sunny
31°F to 54°F
22-09-2024
Clear/Sunny
36°F to 67°F
23-09-2024
Clear/Sunny
47°F to 63°F
24-09-2024
Clear/Sunny
45°F to 74°F
25-09-2024
Clear/Sunny
49°F to 81°F
26-09-2024
Clear/Sunny
47°F to 70°F
27-09-2024
Clear/Sunny
45°F to 76°F
28-09-2024
Clear/Sunny
50°F to 72°F
29-09-2024
Clear/Sunny
49°F to 76°F
30-09-2024
Clear/Sunny
34°F to 50°F

Map: other cities in the United States (USA) in september

Cities near Montana:

Helena (Montana) in septembertolerable weather
Yellowstone National Park in septembervery bad weather
Cody (Wyoming) in septembertolerable weather
Glacier National Park (Montana) in septembervery bad weather
Grand Teton National Park (Wyoming) in septembervery bad weather
Jackson Hole in septembervery bad weather
Wyoming in septembergood weather
Boise (Idaho) in septemberperfect weather
Mount Rushmore in septembergood weather
Salt Lake City in septembergood weather
North Dakota in septembergood weather
Utah in septemberperfect weather
United States in september: See full list of cities

Click over cities on the map for information about the weather in september.

Legend: Montana perfect weather good tolerable bad very bad


Weather data for Montana in september:

Weather data for Montana for september are derived from an average of the weather forecast since 2009 in Montana. There is a margin of error and these forecasts are to be considered as general information only. The weather in Montana can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Montana.


Weather in august in Montana
Weather in october in Montana
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