September weather forecast
Sibley, ND

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Weather in September

September, the first month of the autumn in Sibley, is still a pleasant month, with an average temperature ranging between min 51.4°F (10.8°C) and max 70.7°F (21.5°C).

Temperature

September's arrival corresponds with a decrease in average high-temperatures, from August's warm 80.2°F (26.8°C) to a pleasant 70.7°F (21.5°C). An average low-temperature of 51.4°F (10.8°C) is observed during September nights in Sibley.

Humidity

In September, the average relative humidity in Sibley is 62%.

Rainfall

In September, in Sibley, the rain falls for 8.2 days. Throughout September, 1.06" (27mm) of precipitation is accumulated. Throughout the year, in Sibley, North Dakota, there are 94.8 rainfall days, and 14.92" (379mm) of precipitation is accumulated.

Snowfall

In Sibley, snow does not fall in June through September.

Daylight

In Sibley, the average length of the day in September is 12h and 32min.
On the first day of the month, sunrise is at 6:52 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:12 pm CDT.

Sunshine

In Sibley, the average sunshine in September is 8.6h.

UV index

In Sibley, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A typical high UV index of 4 in September suggests the following recommendations:
Exercise prevention - Warding off sunburn is urged. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

What are September temperatures in Sibley?

The average high-temperature, in September, in Sibley, is 70.7°F (21.5°C), while the average low-temperature is 51.4°F (10.8°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in July is evaluated at 84.2°F (29°C).

What is the average humidity in September in Sibley?

In September, the average relative humidity in Sibley is 62%.

How much does it rain in Sibley in September?

In Sibley, North Dakota, during September, the rain falls for 8.2 days and regularly aggregates up to 1.06" (27mm) of precipitation.

When it does not snow in Sibley?

In Sibley, snow does not fall in June through September.

Does it snow in Sibley in September?

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

How many hours of daylight does Sibley have in September?

The average day length in September is 12h and 32min.

When are sunrise and sunset in September in Sibley?

On the first day of September in Sibley, sunrise is at 6:52 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:12 pm CDT.

How many hours of sunshine does Sibley have in September?

In September, the average sunshine duration in Sibley is 8.6h.

What is the UV index intensity in September in Sibley?

The average daily maximum UV index in September in Sibley is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Sibley, ND

Average temperature in September - Sibley, ND
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (17.1°F).

  • Average low temperature in September: 51.4°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (3.4°F).

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Average pressure in September
Sibley, ND

Average pressure in September - Sibley, ND
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is February (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in September
Sibley, ND

Average wind speed in September - Sibley, ND
  • Average wind speed in September: 10.2mph

The windiest month (with the highest average wind speed) is October (11.4mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).

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Average humidity in September
Sibley, ND

Average humidity in September - Sibley, 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 (61%).

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Average rainfall in September
Sibley, ND

Average rainfall in September - Sibley, ND
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is January (0.39").

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Average rainfall days in September
Sibley, ND

Average rainfall days in September - Sibley, ND
  • Average rainfall days in September: 8.2 days

The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is January (1.5 days).

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Average snowfall in September
Sibley, ND

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

The month with the highest snowfall is December (3.11").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Sibley, ND

Average snowfall days in September - Sibley, ND
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Sibley, ND
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in September
Sibley, ND

Average sunshine days in September - Sibley, ND
  • Average sunshine days in September: 19.1 days

The month with the most sunshine days is October (20 days).
The month with the least sunshine days is June (12.3 days).

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Average UV index in September
Sibley, ND

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

The months with the highest UV index are June and 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
Sibley, ND

Average cloud cover in September - Sibley, ND
  • Average cloud cover in September: 28

The months with the most cloud cover are January and February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in September
Sibley, ND

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

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

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Sibley, North Dakota, USA

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