Colstrip
Montana, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Colstrip, MT

The first month of the autumn, September, is also a moderately hot month in Colstrip, Montana, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 43.3°F (6.3°C).

Temperature

In September, the average high-temperature decreases, from a tropical 86.7°F (30.4°C) in August, to a warm 75°F (23.9°C). In September, in Colstrip, the average low-temperature is 43.3°F (6.3°C).

Rainfall

In Colstrip, in September, it is raining for 5 days, with typically 1.3" (33mm) of accumulated precipitation. In Colstrip, during the entire year, the rain falls for 75 days and collects up to 15" (382mm) of precipitation.

Daylight

The average length of the day in September in Colstrip is 12.5h.

What is the temperature in September in Colstrip?

The average high-temperature, in September, in Colstrip, is 75°F (23.9°C), while the average low-temperature is 43.3°F (6.3°C).

How many days does it rain in September in Colstrip?

In September, in Colstrip, Montana, the rain falls for 5 days. Throughout September, 1.3" (33mm) of precipitation is accumulated.

How many hours of daylight does Colstrip have in September?

In Colstrip, Montana, the average length of the day in September is 12.5h.
Average temperature in September - Colstrip, MT
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in September: 43.3°F

The month with the highest average low temperature is July (55.6°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).

Average rainfall in September - Colstrip, MT
  • Average rainfall in September: 1.3"

The wettest month (with the highest rainfall) is June (2.7").
The driest month (with the lowest rainfall) is February (0.5").

Average rainfall days in September - Colstrip, MT
  • Average rainfall days in September: 5 days

The month with the highest number of rainy days is May (10 days).
Months with the lowest number of rainy days are February, August, September, October, November and December (5 days).

Average daylight in September - Colstrip, MT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).