Weather in September
The first month of the autumn, September, is also an agreeable month in Chinook, Montana, with an average temperature fluctuating between 72.1°F (22.3°C) and 38.7°F (3.7°C).
On the first day of September in Chinook, sunrise is at 6:35 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:57 pm MDT.
Temperature
September's arrival correlates with a reduction in the average high-temperature, down from a warm 83.7°F (28.7°C) in August to an agreeable 72.1°F (22.3°C). Nighttime temperatures exhibit a substantial dip from daytime highs during September, averaging at an icy 38.7°F (3.7°C).Rainfall
During September, Chinook regularly aggregates up to 1.42" (36mm) of precipitation. During the entire year, Chinook aggregates up to 13.07" (332mm) of precipitation.Daylight
In Chinook, the average length of the day in September is 12h and 34min.On the first day of September in Chinook, sunrise is at 6:35 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:57 pm MDT.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Chinook?
During September, Chinook experiences an average high-temperature of 72.1°F (22.3°C) and a low-temperature of 38.7°F (3.7°C).
How much does it rain in Chinook in September?
Throughout September, in Chinook, Montana, 1.42" (36mm) of precipitation is accumulated.
What is the average length of the day in September in Chinook?
The average day length in September in Chinook, Montana, is 12h and 34min.
When is the sunrise / sunset in September in Chinook?
In September, on the first day of the month, sunrise is at 6:35 am and sunset at 7:58 pm. On the last day of the month, in Chinook, sunrise is at 7:16 am and sunset at 6:57 pm MDT.
Average temperature in September
Chinook, MT
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in September: 38.6°F
The month with the highest average low temperature is July (53.1°F).
The coldest month (with the lowest average low temperature) is January (-0.5°F).
Average rainfall in September
Chinook, MT
- Average rainfall in September: 1.4"
The wettest months (with the highest rainfall) are May and June (2.3").
The driest month (with the least rainfall) is February (0.3").
Average daylight in September
Chinook, MT
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
Chinook, Montana, USA
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