September weather forecastWahpeton, ND
September
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
During the shift to September, Wahpeton records a mild decrease in average high-temperature, moving from a moderately hot 80.8°F (27.1°C) in August to an agreeable 72°F (22.2°C). Wahpeton records an average low-temperature of 52.5°F (11.4°C) throughout the month of September.Humidity
May and September, with an average relative humidity of 65%, are the least humid months.Rainfall
In Wahpeton, in September, during 9.3 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Wahpeton, during the entire year, the rain falls for 108.3 days and collects up to 18.78" (477mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September 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 is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 during September translates into the following guidance:
Undertake precautions - It is suggested to shield oneself from sunburn. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in September /
Average sunshine in September
Wahpeton, ND
- Average daylight in September: 12h and 30min
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 54min
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).
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).
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).
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).
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).
