September weather forecast and climate
Merricourt, ND

September, the first month of the autumn, in Merricourt, is still a pleasant month, with average temperature fluctuating between 72.7°F (22.6°C) and 52.2°F (11.2°C).

Temperature

In Merricourt, the average high-temperature decreases, from a moderately hot 81.9°F (27.7°C) in August, to a pleasant 72.7°F (22.6°C). In Merricourt, in September, the average low-temperature is 52.2°F (11.2°C).

Humidity

August and September, with an average relative humidity of 61%, are the least humid months in Merricourt.

Rainfall

In Merricourt, in September, during 8.4 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, in Merricourt, there are 92.3 rainfall days, and 15.28" (388mm) of precipitation is accumulated.

Snowfall

In Merricourt snow does not fall in June through September.

Daylight

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

Sunshine

In Merricourt, the average sunshine in September is 8.5h.

UV index

In Merricourt, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Merricourt?

The average high-temperature, in September, in Merricourt, North Dakota, is 72.7°F (22.6°C), while the average low-temperature is 52.2°F (11.2°C).

What are the least humid months in Merricourt?

August and September, with an average relative humidity of 61%, are the least humid months.

What is the average humidity in September in Merricourt?

In September, the average relative humidity in Merricourt is 61%.

How many days does it rain in September in Merricourt?

In September, in Merricourt, North Dakota, the rain falls for 8.4 days. Throughout September, 1.14" (29mm) of precipitation is accumulated.

Does it snow in Merricourt in September?

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

When it does not snow in Merricourt?

June through September are months without snowfall in Merricourt.

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

In Merricourt, North Dakota, the average length of the day in September is 12.5h.

How long on average sun shines in September in Merricourt?

The average sunshine in September is 8.5h.

How high is the UV index in September in Merricourt?

In Merricourt, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Merricourt, ND
  • Average high temperature in September: 72.7°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (19.8°F).

  • Average low temperature in September: 52.2°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).

Average pressure in September - Merricourt, ND
  • Average pressure in September: 29.96"

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

The windiest months (with the highest average wind speed) are April and October (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

Average humidity in September - Merricourt, ND
  • Average humidity in September: 61%

The month with the highest relative humidity is January (89%).
Months with the lowest relative humidity are August and September (61%).

Average rainfall in September - Merricourt, ND
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is June (2.83").
The driest month (with the least rainfall) is January (0.39").

Average rainfall days in September - Merricourt, ND
  • Average rainfall days in September: 8.4 days

The month with the highest number of rainy days is June (14.3 days).
The month with the least rainy days is January (1.7 days).

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

Months with the highest snowfall are January and December (2.76").
Months with the least snowfall are June, July, August and September (0").

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

The month with the highest number of snowfall days is February (11.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Merricourt, 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: 8.5h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 3.8h).

Average sunshine days in September - Merricourt, ND
  • Average sunshine days in September: 20.4 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).

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

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

Average cloud cover in September - Merricourt, ND
  • Average cloud cover in September: 27

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 24).

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

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