United StatesThe weather in September in Montana
It's pleasantly warm in September in Montana with an average temperature of 21°C. Temperatures this month range from a low of 16°C to a high of 27°C. At night, you can expect temperatures between 5°C and 11°C.
Looking for great weather? September is a good time to be in Montana. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Montana, United States. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 40°C in 2022, Montana reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was -3°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of -8°C to a highest value of 18°C.
Precipitation and snowfall
In September, there is an average of 54 mm of precipitation, spread over 8 days. Of the total precipitation, about 2,8 cm falls as snow in September. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in September for Montana
Click on any day in September to get detailed info about the usual weather on that day in Montana. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Montana | New York | |
|---|---|---|
| Average temperature | 21°C | 27°C |
| Max. temperature | 27°C | 31°C |
| Min. temperature | 5°C | -5°C |
| Total precipitation | 54 mm | 57 mm |
| Rainy days | 8 days | 9 days |
| Total snowfall | 2,8 cm | 0 cm |
| Snowy days | 2 days | 0 days |
Start of September
The month of September starts in Montana with warm temps, averaging around 24°C during the day and nights around 10°C.
Mid September
By mid-September, daytime temps drop to around 21°C, with nights around 9°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Montana is around 20°C, while nighttime temps are about 7°C. A shower might pop up, but overall, the weather will be dry and sunny.
Find affordable vacations to Montana
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Montana for all months and discover the best travel time
The climate in Montana is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Montana to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in Montana, United States. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Montana
Temperature in September in Montana over the years
Precipitation charts
These charts show the average amount of precipitation in September in Montana, United States. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Montana
Total precipitation in September in Montana over the years
Daily Snowfall in September in Montana
Snowfall in September in Montana per year
Daily UV index in September in Montana
This chart shows the average daily UV index in September in Montana, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Montana
Have you been to Montana in September?
Share your weather experience in September in Montana.
Average weather in Montana by month
Click on a month below to see detailed weather info for Montana. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.