September weather forecastCavalier, ND
September
Weather in September
As Cavalier, North Dakota moves into September, the signals of the changing season become evident with shorter daylight hours and falling temperatures. The weather transitions gently, maintaining relative warmth from the summer while heralding the comforts of autumn. The most substantial sign of this is how temperatures start to cool slightly with an average high of 69.3°F (20.7°C). As the leaves begin to turn, the arrival of October amplifies these visual and climatic changes further.Temperature
Cavalier's transition into September involves a shift in temperature, receding from a moderately hot 79.9°F (26.6°C) in August to an agreeable 69.3°F (20.7°C). In September, the recorded average low-temperature is a fresh 51.3°F (10.7°C).Humidity
In September, the average relative humidity is 62%.Rainfall
In Cavalier, during September, the rain falls for 9.6 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, there are 101.7 rainfall days, and 14.96" (380mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 73.1 snowfall days, and 18.07" (459mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:48 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:10 pm CDT.
Sunshine
The average sunshine in September in Cavalier is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 4 during September leads to these advisories:
Exercise prevention - Warding off sunburn is urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cavalier, ND
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is January (14.2°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (0.9°F).
Average pressure in September
Cavalier, ND
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Cavalier, ND
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in September
Cavalier, 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 (59%).
Average rainfall in September
Cavalier, ND
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is June (2.56").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in September
Cavalier, ND
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (2 days).
Average snowfall in September
Cavalier, ND
- Average snowfall in September: 0.04"
The month with the highest snowfall is December (3.43").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Cavalier, ND
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Cavalier, ND
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Cavalier, ND
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is August (19.2 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Cavalier, ND
- Average UV index in September: 4
The month with the highest UV index is 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
Cavalier, ND
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Cavalier, ND
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
