September weather forecastKnox, ND
September
Weather in September
September, the first month of the autumn in Knox, is still a pleasant month, with an average temperature ranging between max 69.4°F (20.8°C) and min 50.2°F (10.1°C).Temperature
The onset of September is marked by a decrease in temperature, transitioning from a moderately hot 80.1°F (26.7°C) in August to a pleasant 69.4°F (20.8°C). During September, Knox witnesses a consistent average low-temperature of 50.2°F (10.1°C).Humidity
In September, the average relative humidity in Knox is 59%.Rainfall
In Knox, during September, the rain falls for 8.9 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, in Knox, there are 96 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
In Knox, North Dakota, snow does not fall in June through September.Daylight
In Knox, the average length of the day in September is 12h and 34min.On the first day of September in Knox, North Dakota, sunrise is at 6:57 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:19 pm CDT.
Sunshine
In Knox, the average sunshine in September 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 exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Knox, ND
- Average high temperature in September: 69.4°F
The warmest month (with the highest average high temperature) is August (80.1°F).
The month with the lowest average high temperature is January (15.3°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (1.2°F).
Average pressure in September
Knox, ND
- Average pressure in September: 29.95"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
Knox, ND
- Average wind speed in September: 9.9mph
The windiest month (with the highest average wind speed) is October (11mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Knox, ND
- Average humidity in September: 59%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (57%).
Average rainfall in September
Knox, ND
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in September
Knox, ND
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in September
Knox, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.9").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Knox, ND
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (16.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Knox, ND
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 36min
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
Knox, ND
- Average sunshine days in September: 19.8 days
The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in September
Knox, 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 and December (UV index 1).
Average cloud cover in September
Knox, ND
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Knox, 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).
