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
September's advent presents an average high-temperature of a still moderately hot 74.3°F (23.5°C), indicating a slight variation from the conditions of the previous month. Bethany Beach observes a slightly reduced average nighttime temperature of 68.9°F (20.5°C) during September.Humidity
The average relative humidity in September is 77%.Rainfall
In Bethany Beach, during September, the rain falls for 12.6 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Bethany Beach, during the entire year, the rain falls for 147.8 days and collects up to 23.98" (609mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm EDT.
Sunshine
The average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September in Bethany Beach is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 during September translates into the following directions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Bethany Beach have in September?
What is the UV index reading in September?
Average temperature in September
Bethany Beach, DE
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Bethany Beach, 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
Bethany Beach, DE
- Average wind speed in September: 11.2mph
The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in September
Bethany Beach, DE
- Average humidity in September: 77%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Bethany Beach, DE
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is August (2.68").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in September
Bethany Beach, DE
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in September
Bethany Beach, DE
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Bethany Beach, DE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.8 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
Bethany Beach, 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 month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Bethany Beach, DE
- Average sunshine days in September: 14.7 days
The months with the most sunshine days are January and November (18.4 days).
The month with the least sunshine days is August (13.2 days).
Average UV index in September
Bethany Beach, 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
Bethany Beach, DE
- Average cloud cover in September: 32
The months with the most cloud cover are February, March and December (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Bethany Beach, 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).
Bethany Beach, Delaware, USA
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