September weather forecastCooperstown, ND
September
Weather in September
September brings about a change in Cooperstown's weather, with temperatures dropping to 70.7°F (21.5°C). This gradual cooling signifies the arrival of fall. The weather remains pleasant for outdoor activities without the intensity of the summer heat. The end of the month usually experiences a noticeable drop in temperature, providing early hints of the approaching winter. Despite the sunny days, cooler nights contribute to a feel of fall in Cooperstown.Temperature
September's onset brings a slight change in high-temperatures, falling from a warm 80.2°F (26.8°C) in August to an agreeable 70.7°F (21.5°C). Throughout the month of September, the average temperature dips to a cool 51.4°F (10.8°C) at night.Humidity
In Cooperstown, the average relative humidity in September is 62%.Rainfall
In September, the rain falls for 8.2 days. Throughout September, 1.06" (27mm) of precipitation is accumulated. In Cooperstown, North Dakota, during the entire year, the rain falls for 94.8 days and collects up to 14.92" (379mm) of precipitation.Snowfall
In Cooperstown, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 33min.On the first day of the month, sunrise is at 6:52 am and sunset at 8:12 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:13 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cooperstown, ND
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (17.1°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (3.4°F).
Average pressure in September
Cooperstown, ND
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is February (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Cooperstown, ND
- Average wind speed in September: 10.2mph
The windiest month (with the highest average wind speed) is October (11.4mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).
Average humidity in September
Cooperstown, ND
- Average humidity in September: 62%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Cooperstown, ND
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Cooperstown, ND
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is January (1.5 days).
Average snowfall in September
Cooperstown, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cooperstown, ND
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cooperstown, ND
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Cooperstown, ND
- Average sunshine days in September: 19.1 days
The month with the most sunshine days is October (20 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Cooperstown, 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, November and December (UV index 1).
Average cloud cover in September
Cooperstown, ND
- Average cloud cover in September: 28
The months with the most cloud cover are January and February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Cooperstown, 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).
