September weather forecast
Bethany Beach, DE

Weather in September

September, the first month of the autumn in Bethany Beach, is also a moderately hot month, with an average temperature ranging between max 74.3°F (23.5°C) and min 68.9°F (20.5°C).

Temperature

In Bethany Beach, the average high-temperature in September is essentially the same as in August - a still warm 74.3°F (23.5°C). The average low-temperature, in September, is 68.9°F (20.5°C).

Humidity

In Bethany Beach, Delaware, the average relative humidity in September is 77%.

Rainfall

In Bethany Beach, during 12.6 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Bethany Beach, during the entire year, the rain falls for 147.8 days and collects up to 23.98" (609mm) of precipitation.

Snowfall

In Bethany Beach, snow does not fall in April through November.

Daylight

In September, the average length of the day in Bethany Beach is 12h and 25min.
On the first day of September, sunrise is at 6:29 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm EDT.

Sunshine

In September, the average sunshine in Bethany Beach is 9.3h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Bethany Beach?

The average relative humidity in September in Bethany Beach is 77%.

How many days does it rain in September in Bethany Beach?

In Bethany Beach, in September, it is raining for 12.6 days, with typically 1.77" (45mm) of accumulated precipitation.

When it does not snow in Bethany Beach?

April through November are months without snowfall in Bethany Beach, Delaware.

What is the average length of the day in September in Bethany Beach?

The average day length in September in Bethany Beach, Delaware, is 12h and 25min.

What time are sunrise and sunset in September in Bethany Beach?

In September, on the first day of the month, sunrise is at 6:29 am and sunset at 7:30 pm. On the last day of the month, in Bethany Beach, sunrise is at 6:55 am and sunset at 6:44 pm EDT.

How many hours of sunshine does Bethany Beach have in September?

In September, the average sunshine duration in Bethany Beach, Delaware, is 9.3h.

What is the UV index reading in September in Bethany Beach?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Bethany Beach, DE

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).

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Average pressure in September
Bethany Beach, DE

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).

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Average wind speed in September
Bethany Beach, DE

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).

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Average humidity in September
Bethany Beach, DE

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%).

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Average rainfall in September
Bethany Beach, DE

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").

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Average rainfall days in September
Bethany Beach, DE

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).

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Average snowfall in September
Bethany Beach, DE

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").

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Average snowfall days in September
Bethany Beach, DE

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).

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Average daylight in September /
Average sunshine in September
Bethany Beach, DE

Average daylight in September / Average sunshine in September - Bethany Beach, DE
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 32min).

  • Average sunshine in September: 9h and 18min

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).

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Average sunshine days in September
Bethany Beach, DE

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).

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Average UV index in September
Bethany Beach, DE

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).

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Average cloud cover in September
Bethany Beach, DE

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).

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Average visibility in September
Bethany Beach, DE

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).

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