September weather forecast and climate
Culbertson, MT

September, the first month of the autumn, in Culbertson, is still a pleasant month, with average temperature ranging between min 54.3°F (12.4°C) and max 72.3°F (22.4°C).

Temperature

In September, the average high-temperature decreases, from a warm 82.8°F (28.2°C) in August, to an agreeable 72.3°F (22.4°C). In Culbertson, the average low-temperature is 54.3°F (12.4°C).

Humidity

In Culbertson, the average relative humidity is 48%.

Rainfall

In Culbertson, Montana, it is raining for 7.5 days, with typically 1.06" (27mm) of accumulated precipitation. In Culbertson, Montana, during the entire year, the rain falls for 85.7 days and collects up to 8.5" (216mm) of precipitation.

Snowfall

In Culbertson snow does not fall in June through September.

Daylight

In Culbertson, Montana, the average length of the day is 12.5h.

Sunshine

In Culbertson, the average sunshine is 10h.

UV index

In Culbertson, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Culbertson?

In September, in Culbertson, the average high-temperature is 72.3°F (22.4°C), and the average low-temperature is 54.3°F (12.4°C).

What is the average humidity in September in Culbertson?

In September, the average relative humidity is 48%.

How much does it rain in Culbertson in September?

In Culbertson, Montana, during September, the rain falls for 7.5 days and regularly aggregates up to 1.06" (27mm) of precipitation.

Does it snow in Culbertson in September?

In Culbertson, Montana, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Culbertson?

In Culbertson, Montana, snow does not fall in June through September.

What is the average length of the day in September in Culbertson?

The average length of the day in September in Culbertson, Montana, is 12.5h.

How many hours of sunshine does Culbertson have in September?

The average sunshine in September in Culbertson is 10h.

How high is the UV index in September in Culbertson?

The average daily maximum UV index in September in Culbertson is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in September - Culbertson, MT
  • Average high temperature in September: 22.4°C

The warmest month (with the highest average high temperature) is July (29°C).
The month with the lowest average high temperature is January (-4.8°C).

  • Average low temperature in September: 12.4°C

The month with the highest average low temperature is July (17.2°C).
The coldest month (with the lowest average low temperature) is January (-12.3°C).

Average pressure in September - Culbertson, MT
  • Average pressure in September: 1013.5mbar

The month with the highest atmospheric pressure is February (1021.5mbar).
The month with the lowest atmospheric pressure is June (1010.3mbar).

Average wind speed in September - Culbertson, MT
  • Average wind speed in September: 16.6km/h

The windiest month (with the highest average wind speed) is April (17.9km/h).
The calmest month (with the lowest average wind speed) is February (14.8km/h).

Average humidity in September - Culbertson, MT
  • Average humidity in September: 48%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (45%).

Average rainfall in September - Culbertson, MT
  • Average rainfall in September: 27mm

The wettest month (with the highest rainfall) is July (34mm).
The driest month (with the least rainfall) is January (6mm).

Average rainfall days in September - Culbertson, MT
  • Average rainfall days in September: 7.5 days

The month with the highest number of rainy days is June (11.4 days).
Months with the least rainy days are January and February (3.2 days).

Average snowfall in September - Culbertson, MT
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (45mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September - Culbertson, MT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (12 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Culbertson, MT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.4h).

  • Average sunshine in September: 10h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is February (Average sunshine: 4.3h).

Average sunshine days in September - Culbertson, MT
  • Average sunshine days in September: 20.7 days

The month with the most sunshine days is September (20.7 days).
The month with the least sunshine days is April (15.8 days).

Average UV index in September - Culbertson, MT
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January and February (UV index 1).

Average cloud cover in September - Culbertson, MT
  • Average cloud cover in September: 24

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 18).

Average visibility in September - Culbertson, MT
  • Average visibility in September: 10km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, November and December (9km).