Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Glen Ullin in September demonstrates a small temperature transition, adjusting from an average high of a moderately hot 81.9°F (27.7°C) in August to a pleasant 71.6°F (22°C). Throughout the month of September, Glen Ullin witnesses an average temperature of 51.8°F (11°C).Humidity
In September, the average relative humidity is 55%.Rainfall
In Glen Ullin, North Dakota, during September, the rain falls for 9.1 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, in Glen Ullin, there are 100.8 rainfall days, and 14.88" (378mm) of precipitation is accumulated.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 in Glen Ullin, sunrise is at 7:08 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:28 pm CDT.
Sunshine
The average sunshine in September in Glen Ullin, North Dakota, is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Glen Ullin?
What is the average humidity in September in Glen Ullin?
How much does it rain in Glen Ullin in September?
When it does not snow in Glen Ullin?
Does it snow in Glen Ullin in September?
What is the average length of the day in September in Glen Ullin?
What time are sunrise and sunset in September in Glen Ullin?
How long on average sun shines in September in Glen Ullin?
How high is the UV index in September in Glen Ullin?
Average temperature in September
Glen Ullin, ND
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (21.2°F).
- Average low temperature in September: 51.8°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (7.2°F).
Average pressure in September
Glen Ullin, ND
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Glen Ullin, ND
- Average wind speed in September: 9.8mph
The windiest months (with the highest average wind speed) are April and October (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Glen Ullin, ND
- Average humidity in September: 55%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Glen Ullin, ND
- Average rainfall in September: 1.93"
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
Glen Ullin, ND
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Glen Ullin, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Glen Ullin, ND
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Glen Ullin, ND
- Average daylight in September: 12h and 3min
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 4min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 4h and 0min).
Average sunshine days in September
Glen Ullin, ND
- Average sunshine days in September: 20 days
The month with the most sunshine days is September (20 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in September
Glen Ullin, ND
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Glen Ullin, ND
- Average cloud cover in September: 25
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 21).
Average visibility in September
Glen Ullin, 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).
Glen Ullin, North Dakota, USA
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