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
In September, the average high-temperature marginally decreases from a moderately hot 79.7°F in August to a still warm 74.3°F. September is characterized by a steady nighttime low-temperature of 68°F.Humidity
In September, the average relative humidity is 78%.Rainfall
In Selbyville, in September, during 12.9 rainfall days, 1.85" of precipitation is typically accumulated. In Selbyville, during the entire year, the rain falls for 144.6 days and collects up to 25.51" of precipitation.Snowfall
In Selbyville, snow does not fall in April through October.Daylight
In September, the average length of the day in Selbyville, Delaware, is 12h and 25min.On the first day of September, sunrise is at 6:30 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:46 pm EDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In September, the average daily maximum UV index in Selbyville, Delaware, is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
FAQ
What are September temperatures in Selbyville?
What is the average humidity in September in Selbyville?
How many days does it rain in September in Selbyville?
When it does not snow in Selbyville?
How many hours of daylight does Selbyville have in September?
When are sunrise and sunset in September in Selbyville?
How long on average sun shines in September in Selbyville?
What is the UV index reading in September in Selbyville?
Average temperature in September
Selbyville, DE
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in September: 68°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in September
Selbyville, DE
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Selbyville, DE
- Average wind speed in September: 10.6mph
The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in September
Selbyville, DE
- Average humidity in September: 78%
The month with the highest relative humidity is May (82%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in September
Selbyville, DE
- Average rainfall in September: 1.85"
The wettest months (with the highest rainfall) are July and August (2.87").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in September
Selbyville, DE
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in September
Selbyville, DE
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Selbyville, DE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Selbyville, DE
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Selbyville, DE
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in September
Selbyville, DE
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Selbyville, DE
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Selbyville, DE
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Selbyville, Delaware, USA
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