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 sea temperature 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
The advent of September presents an average high-temperature of a still moderately hot 75.7°F (24.3°C), maintaining a close correlation with the preceding month. The average temperature in Long Neck during September nights dips to a refreshing 65.5°F (18.6°C).Humidity
The average relative humidity in September is 79%.Rainfall
In Long Neck, in September, during 13.8 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. Throughout the year, there are 147.1 rainfall days, and 25.59" (650mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Long Neck.Ocean temperature
In Long Neck, in September, the average water temperature is 72.9°F (22.7°C).Note: Swimming in 72.9°F (22.7°C) water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 77°F (25°C) and 82.4°F (28°C).)
Daylight
In Long Neck, the average length of the day in September is 12h and 26min.On the first day of September in Long Neck, sunrise is at 6:30 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm EDT.
Sunshine
In Long Neck, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September in Long Neck is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: An average UV index of 5 in September transforms into this advice:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
Frequently asked questions
What are the temperatures in Long Neck in September?
What is the average humidity in September in Long Neck?
How much does it rain in Long Neck in September?
When it does not snow in Long Neck?
What is the ocean temperature in September in Long Neck?
How many hours of daylight does Long Neck have in September?
What time are sunrise and sunset in September in Long Neck?
How long on average sun shines in September in Long Neck?
How high is the UV index in September in Long Neck?
Average temperature in September
Long Neck, DE
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in September: 65.5°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Long Neck, 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
Long Neck, DE
- Average wind speed in September: 8.8mph
The windiest months (with the highest average wind speed) are January, February and March (11.1mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in September
Long Neck, DE
- Average humidity in September: 79%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in September
Long Neck, DE
- Average rainfall in September: 2.13"
The wettest months (with the highest rainfall) are July and August (2.95").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
Long Neck, DE
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in September
Long Neck, DE
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Long Neck, DE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in September
Long Neck, DE
- Average sea temperature in September: 72.8°F
The best month for swimming (with the highest average sea temperature) is August (76.9°F).
The coldest month (with the lowest average sea temperature) is February (40.7°F).
Average daylight in September /
Average sunshine in September
Long Neck, 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: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Long Neck, DE
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (12.2 days).
Average UV index in September
Long Neck, 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
Long Neck, DE
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Long Neck, 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).
Long Neck, Delaware, USA
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