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
Entering September, the average high-temperature is recorded at a still warm 74.3°F (23.5°C), exhibiting a minimal shift from August's 79.3°F (26.3°C). In Bethany Beach, September nights maintain a consistent temperature, with an average low of 68.9°F (20.5°C).Humidity
The average relative humidity in September in Bethany Beach, Delaware, is 77%.Rainfall
In Bethany Beach, in September, it is raining for 12.6 days, with typically 1.77" (45mm) of accumulated 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
In September, the average length of the day is 12h and 25min.On the first day of September in Bethany Beach, 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
In Bethany Beach, 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 health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 during September leads to these advisories:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What is the average September temperature in Bethany Beach?
What is the average humidity in September in Bethany Beach?
How many days does it rain in September in Bethany Beach?
When it does not snow in Bethany Beach?
What is the average length of the day in September in Bethany Beach?
When is the sunrise / sunset in September in Bethany Beach?
How many hours of sunshine does Bethany Beach have in September?
What is the UV index reading in September in Bethany Beach?
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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