September weather forecast and climate
Grand Forks, ND

The grand University of North Dakota located in Grand Forks, North Dakota
The grand University of North Dakota located in Grand Forks, North Dakota

Weather in September

September, the first month of the autumn, in Grand Forks, is also an agreeable month, with average temperature varying between 51.6°F (10.9°C) and 70.7°F (21.5°C).

Temperature

In Grand Forks, the average high-temperature drops, from a warm 80.6°F (27°C) in August, to an agreeable 70.7°F (21.5°C). The average low-temperature, in September, is 51.6°F (10.9°C).

Humidity

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

Rainfall

In Grand Forks, in September, it is raining for 7.7 days, with typically 0.91" (23mm) of accumulated precipitation. Throughout the year, there are 80.3 rainfall days, and 10.47" (266mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in Grand Forks is 12.5h.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. 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.
[Resources]

FAQ

What is the temperature in September in Grand Forks?

The average high-temperature, in September, in Grand Forks, is 70.7°F (21.5°C), while the average low-temperature is 51.6°F (10.9°C).

What is the average humidity in September in Grand Forks?

The average relative humidity in September is 62%.

How much does it rain in Grand Forks in September?

In September, in Grand Forks, the rain falls for 7.7 days. Throughout September, 0.91" (23mm) of precipitation is accumulated.

Does it snow in Grand Forks in September?

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

When it does not snow in Grand Forks?

June through September are months without snowfall in Grand Forks.

What is the average length of the day in September in Grand Forks?

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

How many hours of sunshine does Grand Forks have in September?

The average sunshine in September in Grand Forks, North Dakota, is 8.6h.

What is the UV index reading in September in Grand Forks?

In Grand Forks, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Grand Forks, ND

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

The warmest month (with the highest average high temperature) is August (80.6°F).
The month with the lowest average high temperature is January (15.3°F).

  • Average low temperature in September: 51.6°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (0.9°F).

[Resources]

Average pressure in September
Grand Forks, ND

Average pressure in September - Grand Forks, ND
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is February (30.16").
The month with the lowest atmospheric pressure is June (29.86").

[Resources]

Average wind speed in September
Grand Forks, ND

Average wind speed in September - Grand Forks, ND
  • Average wind speed in September: 9.8mph

The windiest month (with the highest average wind speed) is October (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).

[Resources]

Average humidity in September
Grand Forks, ND

Average humidity in September - Grand Forks, ND
  • Average humidity in September: 62%

Months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is August (60%).

[Resources]

Average rainfall in September
Grand Forks, ND

Average rainfall in September - Grand Forks, ND
  • Average rainfall in September: 0.91"

The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is January (0.24").

[Resources]

Average rainfall days in September
Grand Forks, ND

Average rainfall days in September - Grand Forks, ND
  • Average rainfall days in September: 7.7 days

The month with the highest number of rainy days is June (14.1 days).
The month with the least rainy days is January (0.8 days).

[Resources]

Average snowfall in September
Grand Forks, ND

Average snowfall in September - Grand Forks, ND
  • Average snowfall in September: 0"

The month with the highest snowfall is December (2.8").
Months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in September
Grand Forks, ND

Average snowfall days in September - Grand Forks, ND
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (11.7 days).
Months with the least snowfall days are June, July, August and September (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Grand Forks, ND

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

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.5h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is January (Average sunshine: 2.9h).

[Resources]

Average sunshine days in September
Grand Forks, ND

Average sunshine days in September - Grand Forks, ND
  • Average sunshine days in September: 21.4 days

The month with the most sunshine days is January (21.5 days).
The month with the least sunshine days is June (13.7 days).

[Resources]

Average UV index in September
Grand Forks, ND

Average UV index in September - Grand Forks, ND
  • Average UV index in September: 4

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

[Resources]

Average cloud cover in September
Grand Forks, ND

Average cloud cover in September - Grand Forks, ND
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 25).

[Resources]

Average visibility in September
Grand Forks, ND

Average visibility in September - Grand Forks, ND
  • Average visibility in September: 6mi

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

[Resources]