September weather forecast
Cavalier, ND

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Weather in September

As Cavalier, North Dakota moves into September, the signals of the changing season become evident with shorter daylight hours and falling temperatures. The weather transitions gently, maintaining relative warmth from the summer while heralding the comforts of autumn. The most substantial sign of this is how temperatures start to cool slightly with an average high of 69.3°F (20.7°C). As the leaves begin to turn, the arrival of October amplifies these visual and climatic changes further.

Temperature

The arrival of September corresponds with a temperature reduction, down from August's warm 79.9°F (26.6°C) to a pleasant 69.3°F (20.7°C). In the month of September, Cavalier records a consistent average low-temperature of 51.3°F (10.7°C).

Humidity

In September, the average relative humidity is 62%.

Rainfall

In Cavalier, in September, it is raining for 9.6 days, with typically 1.65" (42mm) of accumulated precipitation. In Cavalier, during the entire year, the rain falls for 101.7 days and collects up to 14.96" (380mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. September is the first month it typically snows in Cavalier. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 73.1 snowfall days, and 18.07" (459mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 34min.
On the first day of the month, sunrise is at 6:48 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:10 pm CDT.

Sunshine

In Cavalier, the average sunshine in September is 8.8h.

UV index

In Cavalier, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: An average maximum UV index of 4 in September leads to these recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Frequently asked questions

What is the usual temperature for Cavalier in September?

In Cavalier, 69.3°F (20.7°C) is the average high-temperature and 51.3°F (10.7°C) is the average low-temperature during September.

What is the average humidity in September in Cavalier?

In September, the average relative humidity in Cavalier, North Dakota, is 62%.

How many days does it rain in September in Cavalier?

In Cavalier, in September, during 9.6 rainfall days, 1.65" (42mm) of precipitation is typically accumulated.

When does it start snowing in Cavalier?

September is the first month it typically snows in Cavalier, North Dakota. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

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

In September, the average day length in Cavalier is 12h and 34min.

What time are sunrise and sunset in September in Cavalier?

On the first day of September in Cavalier, sunrise is at 6:48 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:10 pm CDT.

How many hours of sunshine does Cavalier have in September?

In Cavalier, the average sunshine duration in September is 8.8h.

What is the UV index intensity in September in Cavalier?

The average daily maximum UV index in September in Cavalier, North Dakota, is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Cavalier, ND

Average temperature in September - Cavalier, ND
  • Average high temperature in September: 69.3°F

The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is January (14.2°F).

  • Average low temperature in September: 51.3°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 (0.9°F).

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Average pressure in September
Cavalier, ND

Average pressure in September - Cavalier, ND
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in September
Cavalier, ND

Average wind speed in September - Cavalier, ND
  • Average wind speed in September: 9.6mph

The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).

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Average humidity in September
Cavalier, ND

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

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in September
Cavalier, ND

Average rainfall in September - Cavalier, ND
  • Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is June (2.56").
The driest month (with the least rainfall) is February (0.51").

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Average rainfall days in September
Cavalier, ND

Average rainfall days in September - Cavalier, ND
  • Average rainfall days in September: 9.6 days

The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (2 days).

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Average snowfall in September
Cavalier, ND

Average snowfall in September - Cavalier, ND
  • Average snowfall in September: 0.04"

The month with the highest snowfall is December (3.43").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Cavalier, ND

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

The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Cavalier, ND

Average daylight in September / Average sunshine in September - Cavalier, ND
  • 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 18min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

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Average sunshine days in September
Cavalier, ND

Average sunshine days in September - Cavalier, ND
  • Average sunshine days in September: 18.5 days

The month with the most sunshine days is August (19.2 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index in September
Cavalier, ND

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

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

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Average cloud cover in September
Cavalier, ND

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

The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in September
Cavalier, ND

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

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

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Cavalier, North Dakota, USA

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