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
Transition into September marks a drop in the average high-temperature, moving from a moderately hot 81.3°F (27.4°C) in August to a pleasant 71.1°F (21.7°C). During September, the average low-temperature is a cool 51.3°F (10.7°C).Humidity
In Still, the average relative humidity in September is 57%.Rainfall
In Still, in September, during 9.1 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Still, during the entire year, the rain falls for 100.5 days and collects up to 15.2" (386mm) of precipitation.Snowfall
In Still, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 7:02 am and sunset at 8:21 pm. On the last day of September, sunrise is at 7:41 am and sunset at 7:23 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September in Still?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Still have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Still have in September?
How high is the UV index in September in Still?
Average temperature in September
Still, ND
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in September
Still, ND
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Still, ND
- Average wind speed in September: 10.3mph
The windiest months (with the highest average wind speed) are April and October (11.1mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in September
Still, ND
- Average humidity in September: 57%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Still, ND
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (2.6").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in September
Still, ND
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is June (14.9 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Still, ND
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.78").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Still, ND
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Still, ND
- Average daylight in September: 12h and 3min
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 36min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Still, 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 April (12.8 days).
Average UV index in September
Still, 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 and December (UV index 1).
Average cloud cover in September
Still, ND
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Still, 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).
Still, North Dakota, USA
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