September weather forecast and climate
Dahlen, ND

September, the first month of the autumn, in Dahlen, is also an agreeable month, with average temperature fluctuating between 69.3°F (20.7°C) and 50.9°F (10.5°C).

Temperature

In September, the average high-temperature decreases, from a warm 79.5°F (26.4°C) in August, to an agreeable 69.3°F (20.7°C). The average low-temperature, is 50.9°F (10.5°C).

Humidity

The average relative humidity in Dahlen is 62%.

Rainfall

In Dahlen, in September, during 9.2 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. Throughout the year, in Dahlen, North Dakota, there are 99.8 rainfall days, and 16.46" (418mm) of precipitation is accumulated.

Snowfall

In Dahlen, North Dakota, snow does not fall in June through September.

Daylight

In Dahlen, the average length of the day is 12.5h.

Sunshine

In September, the average sunshine is 8.7h.

UV index

The average daily maximum UV index in Dahlen is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard 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 the skin and eye damage is obliged. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in September in Dahlen?

The average high-temperature, in September, in Dahlen, is 69.3°F (20.7°C), while the average low-temperature is 50.9°F (10.5°C).

What is the average humidity in September in Dahlen?

The average relative humidity in September is 62%.

How much does it rain in Dahlen in September?

In Dahlen, North Dakota, in September, it is raining for 9.2 days, with typically 1.73" (44mm) of accumulated precipitation.

Does it snow in Dahlen in September?

In Dahlen, North Dakota, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Dahlen?

June through September are months without snowfall in Dahlen, North Dakota.

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

In Dahlen, the average length of the day in September is 12.5h.

How many hours of sunshine does Dahlen have in September?

In Dahlen, North Dakota, the average sunshine in September is 8.7h.

What is the UV index reading in September in Dahlen?

In September, the average daily maximum UV index in Dahlen, North Dakota, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Dahlen, ND
  • Average high temperature in September: 69.3°F

The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is January (14.5°F).

  • Average low temperature in September: 50.9°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (1°F).

Average pressure in September - Dahlen, ND
  • Average pressure in September: 29.95"

The month with the highest atmospheric pressure is February (30.17").
The month with the lowest atmospheric pressure is June (29.85").

Average wind speed in September - Dahlen, ND
  • Average wind speed in September: 9.9mph

The windiest month (with the highest average wind speed) is October (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.4mph).

Average humidity in September - Dahlen, ND
  • Average humidity in September: 62%

Months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is August (60%).

Average rainfall in September - Dahlen, ND
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is February (0.51").

Average rainfall days in September - Dahlen, ND
  • Average rainfall days in September: 9.2 days

The month with the highest number of rainy days is June (16.9 days).
The month with the least rainy days is February (2 days).

Average snowfall in September - Dahlen, ND
  • Average snowfall in September: 0"

The month with the highest snowfall is December (3.62").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in September - Dahlen, ND
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (13.8 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in September / Average sunshine in September - Dahlen, ND
  • 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: 8.7h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 3.3h).

Average sunshine days in September - Dahlen, ND
  • Average sunshine days in September: 19 days

The month with the most sunshine days is August (19.9 days).
The month with the least sunshine days is June (10.8 days).

Average UV index in September - Dahlen, ND
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February and November (UV index 1).

Average cloud cover in September - Dahlen, ND
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 24).

Average visibility in September - Dahlen, ND
  • Average visibility in September: 6mi

Months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February, March and December (5mi).