September weather forecast
Wahpeton, ND

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Weather in September

September denotes a transition as the weather in Wahpeton, North Dakota, slowly begins to cool following the ending of the summer in August. On the rainfall scale, September's average of 1.38in echoes a considerable decrease from the preceding month of August. It provides a fitting climate for those who find decrease in temperature more comfortable, as October brings even cooler days. The autumnal equinox makes its presence known through deciduous trees showcasing multicolored foliage. With more moderate conditions, September is a pleasing month for exploration and outdoor events.

Temperature

A minor decrease in the average high-temperature is observed in Wahpeton during September, shifting from a warm 80.8°F (27.1°C) in August to a pleasant 72°F (22.2°C). Wahpeton, in the month of September, anticipates a consistent average low-temperature of 52.5°F (11.4°C).

Humidity

The months with the lowest humidity in Wahpeton are May and September, with an average relative humidity of 65%.

Rainfall

In Wahpeton, during September, the rain falls for 9.3 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, in Wahpeton, North Dakota, there are 108.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 32min.
On the first day of September, sunrise is at 6:47 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:07 pm CDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September in Wahpeton is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: During September, 4 as the daily maximum UV index converts into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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Frequently asked questions

What are the temperatures in Wahpeton in September?

An average high-temperature, in September, in Wahpeton, is 72°F (22.2°C) and the average low-temperature is 52.5°F (11.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is calculated to be 84.2°F (29°C).

What are the least humid months in Wahpeton?

May and September, with an average relative humidity of 65%, are the least humid months in Wahpeton.

What is the average humidity in September in Wahpeton?

In Wahpeton, the average relative humidity in September is 65%.

How much does it rain in Wahpeton in September?

In Wahpeton, during September, the rain falls for 9.3 days and regularly aggregates up to 1.38" (35mm) of precipitation.

When it does not snow in Wahpeton?

June through September are months without snowfall.

Does it snow in Wahpeton in September?

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

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

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

What time are sunrise and sunset in September in Wahpeton?

In September, on the first day of the month, sunrise is at 6:47 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:07 pm CDT.

How many hours of sunshine does Wahpeton have in September?

In Wahpeton, the average sunshine duration in September is 8.9h.

What is the UV index intensity in September in Wahpeton?

In Wahpeton, North Dakota, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Wahpeton, ND

Average temperature in September - Wahpeton, ND
  • Average high temperature in September: 72°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (17.6°F).

  • Average low temperature in September: 52.5°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 (3.9°F).

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Average pressure in September
Wahpeton, ND

Average pressure in September - Wahpeton, ND
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in September
Wahpeton, ND

Average wind speed in September - Wahpeton, ND
  • Average wind speed in September: 9.4mph

The windiest months (with the highest average wind speed) are April and October (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).

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Average humidity in September
Wahpeton, ND

Average humidity in September - Wahpeton, ND
  • Average humidity in September: 65%

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are May and September (65%).

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Average rainfall in September
Wahpeton, ND

Average rainfall in September - Wahpeton, ND
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in September
Wahpeton, ND

Average rainfall days in September - Wahpeton, ND
  • Average rainfall days in September: 9.3 days

The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is February (2.1 days).

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Average snowfall in September
Wahpeton, ND

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

The month with the highest snowfall is December (4.17").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Wahpeton, ND

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

The month with the highest number of snowfall days is December (14.7 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
Wahpeton, ND

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

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

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Average sunshine days in September
Wahpeton, ND

Average sunshine days in September - Wahpeton, ND
  • Average sunshine days in September: 19 days

The month with the most sunshine days is September (19 days).
The month with the least sunshine days is June (11.6 days).

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Average UV index in September
Wahpeton, ND

Average UV index in September - Wahpeton, 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 and December (UV index 1).

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Average cloud cover in September
Wahpeton, ND

Average cloud cover in September - Wahpeton, ND
  • Average cloud cover in September: 29

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

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Average visibility in September
Wahpeton, ND

Average visibility in September - Wahpeton, 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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Wahpeton, North Dakota, USA

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