September weather forecastValley City, ND
September
Weather in September
As summer gives way to fall, September in Valley City brings milder weather conditions. Noteworthy here is the significant drop in temperature highs, although it remains warm. Relative humidity levels start creeping up again, bringing a noticeable change in the atmosphere. With decreasing daylight hours, the days are shorter. Despite this, solar radiation remains reasonably high, suggesting a need for continued sun protection.Temperature
Valley City's transition into September involves a shift in temperature, receding from a warm 80.2°F (26.8°C) in August to an agreeable 70.7°F (21.5°C). During September, Valley City's temperature averages to a cool 51.4°F (10.8°C) at night.Humidity
In September, the average relative humidity is 62%.Rainfall
In Valley City, during September, the rain falls for 8.2 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Valley City, during the entire year, the rain falls for 94.8 days and collects up to 14.92" (379mm) of precipitation.Snowfall
June through September are months without snowfall in Valley City.Daylight
The average length of the day in September in Valley City is 12h and 32min.On the first day of the month, sunrise is at 6:52 am and sunset at 8:10 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:12 pm CDT.
Sunshine
In Valley City, North Dakota, 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 moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valley City, 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
Valley City, 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
Valley City, 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
Valley City, 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
Valley City, 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
Valley City, 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
Valley City, 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
Valley City, 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
Valley City, ND
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- 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
Valley City, 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
Valley City, 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
Valley City, 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
Valley City, 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).
