September weather forecast and climate
Petrel, ND

September, the first month of the autumn, in Petrel, is also an agreeable month, with temperature in the range of an average low of 54°F (12.2°C) and an average high of 73°F (22.8°C).

Temperature

In Petrel, the average high-temperature in September decreases, from a moderately hot 82.6°F (28.1°C) in August, to an agreeable 73°F (22.8°C). The average low-temperature, in Petrel, North Dakota, is 54°F (12.2°C).

Humidity

Months with the lowest humidity are August and September, with an average relative humidity of 51%.

Rainfall

In September, the rain falls for 7.6 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. In Petrel, during the entire year, the rain falls for 101.3 days and collects up to 14.25" (362mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

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

Sunshine

In Petrel, the average sunshine is 9.7h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Petrel?

In Petrel, North Dakota, in September, the average high-temperature is 73°F (22.8°C), and the average low-temperature is 54°F (12.2°C).

What is the least humid month in Petrel?

Months with the lowest humidity are August and September, with an average relative humidity of 51%.

What is the average humidity in September in Petrel?

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

How many days does it rain in September in Petrel?

In Petrel, North Dakota, in September, it is raining for 7.6 days, with typically 1.02" (26mm) of accumulated precipitation.

Does it snow in Petrel in September?

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

When it does not snow in Petrel?

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

How many hours of daylight does Petrel have in September?

The average length of the day in September in Petrel, North Dakota, is 12.5h.

How long on average sun shines in September in Petrel?

In September, the average sunshine in Petrel is 9.7h.

What is the UV index reading in September in Petrel?

The average daily maximum UV index in September in Petrel is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in September - Petrel, ND
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.2°F).

  • Average low temperature in September: 54°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).

Average pressure in September - Petrel, ND
  • Average pressure in September: 29.94"

The month with the highest atmospheric pressure is February (30.16").
The month with the lowest atmospheric pressure is June (29.84").

Average wind speed in September - Petrel, ND
  • Average wind speed in September: 10.7mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).

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

The month with the highest relative humidity is January (85%).
Months with the lowest relative humidity are August and September (51%).

Average rainfall in September - Petrel, ND
  • Average rainfall in September: 1.02"

The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in September - Petrel, ND
  • Average rainfall days in September: 7.6 days

The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is January (2.9 days).

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

The month with the highest snowfall is February (4.53").
Months with the least snowfall are June, July, August and September (0").

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

The month with the highest number of snowfall days is February (12.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in September: 9.7h

The month with the most sunshine is August (Average sunshine: 11.5h).
The month with the least sunshine is January (Average sunshine: 4.6h).

Average sunshine days in September - Petrel, ND
  • Average sunshine days in September: 19.2 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.7 days).

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

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

Average cloud cover in September - Petrel, ND
  • Average cloud cover in September: 23

Months with the most cloud cover are January and February (Cloud cover 52).
Months with the least cloud cover are July and August (Cloud cover 20).

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

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