September weather forecast and climate
Killdeer, ND

September, the first month of the autumn, in Killdeer, is still a pleasant month, with average temperature ranging between min 52.2°F (11.2°C) and max 71.2°F (21.8°C).

Temperature

In September, the average high-temperature decreases, from a moderately hot 81.9°F (27.7°C) in August, to a pleasant 71.2°F (21.8°C). In Killdeer, in September, the average low-temperature is 52.2°F (11.2°C).

Humidity

In September, the average relative humidity in Killdeer is 51%.

Rainfall

In Killdeer, during September, the rain falls for 8.1 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Killdeer, during the entire year, the rain falls for 91.6 days and collects up to 12.64" (321mm) of precipitation.

Snowfall

June through September are months without snowfall in Killdeer.

Daylight

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

Sunshine

In Killdeer, the average sunshine in September is 8.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Killdeer?

The average high-temperature, in September, is 71.2°F (21.8°C), while the average low-temperature is 52.2°F (11.2°C).

What is the average humidity in September in Killdeer?

In September, the average relative humidity in Killdeer, North Dakota, is 51%.

How much does it rain in Killdeer in September?

In Killdeer, North Dakota, in September, it is raining for 8.1 days, with typically 1.61" (41mm) of accumulated precipitation.

Does it snow in Killdeer in September?

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

When it does not snow in Killdeer?

June through September are months without snowfall in Killdeer.

How many hours of daylight does Killdeer have in September?

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

How many hours of sunshine does Killdeer have in September?

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

How high is the UV index in September in Killdeer?

In Killdeer, North Dakota, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Killdeer, ND
  • Average high temperature in September: 21.8°C

The warmest month (with the highest average high temperature) is July (28.4°C).
The month with the lowest average high temperature is January (-5.9°C).

  • Average low temperature in September: 11.2°C

The month with the highest average low temperature is July (16.1°C).
The coldest month (with the lowest average low temperature) is January (-13.7°C).

Average pressure in September - Killdeer, ND
  • Average pressure in September: 1013.7mbar

The month with the highest atmospheric pressure is February (1021.6mbar).
The month with the lowest atmospheric pressure is June (1010.4mbar).

Average wind speed in September - Killdeer, ND
  • Average wind speed in September: 16.1km/h

The windiest month (with the highest average wind speed) is April (17.7km/h).
The calmest month (with the lowest average wind speed) is August (14.4km/h).

Average humidity in September - Killdeer, ND
  • Average humidity in September: 51%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (49%).

Average rainfall in September - Killdeer, ND
  • Average rainfall in September: 41mm

The wettest month (with the highest rainfall) is June (47mm).
The driest months (with the least rainfall) are January and February (11mm).

Average rainfall days in September - Killdeer, ND
  • Average rainfall days in September: 8.1 days

The month with the highest number of rainy days is June (12.6 days).
The month with the least rainy days is February (2.9 days).

Average snowfall in September - Killdeer, ND
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (78mm).
Months with the least snowfall are June, July, August and September (0mm).

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

Months with the highest number of snowfall days are January and December (11.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Killdeer, ND
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.5h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is July (Average sunshine: 11.6h).
Months with the least sunshine are January and December (Average sunshine: 4).

Average sunshine days in September - Killdeer, ND
  • Average sunshine days in September: 20.5 days

The month with the most sunshine days is September (20.5 days).
The month with the least sunshine days is April (14.9 days).

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are February and December (UV index 1).

Average cloud cover in September - Killdeer, ND
  • Average cloud cover in September: 25

The month with the most cloud cover is February (Cloud cover 61).
Months with the least cloud cover are July and August (Cloud cover 19).

Average visibility in September - Killdeer, ND
  • 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 and December (8km).