September weather forecast
Slaughter Beach, DE

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Weather in September

September in Slaughter Beach, Delaware heralds the arrival of fall, with temperatures ranging from 64°F to 76.1°F. Less daylight gives way to longer evenings and cooler nights. Prospects of rainfall lessen as well, making way for clearer skies. A slight drop in sunshine hours corresponds to the changing season but continues to accommodate outdoor events. The wind makes a return with increased speed, leading to cooler and breezy days.

Temperature

September's arrival in Slaughter Beach, Delaware, subtly correlates with a reduction in the average high-temperature, down from a warm 81.5°F in August to a still moderately hot 76.1°F. Slaughter Beach's nights in September cool down to an average low-temperature of 64°F.

Humidity

In Slaughter Beach, Delaware, the average relative humidity in September is 79%.

Rainfall

In Slaughter Beach, in September, during 13.5 rainfall days, 1.85" of precipitation is typically accumulated. Throughout the year, there are 152.4 rainfall days, and 25.94" of precipitation is accumulated.

Snowfall

April, June through October are months without snowfall in Slaughter Beach.

Daylight

In Slaughter Beach, the average length of the day in September is 12h and 26min.
On the first day of September in Slaughter Beach, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:46 pm EDT.

Sunshine

In Slaughter Beach, the average sunshine in September is 9.4h.

UV index

In Slaughter Beach, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 5 during September translates into the following directions:
Act with care - Obligation to protect against skin and eye damage is highlighted. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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FAQ

What is the usual temperature for Slaughter Beach in September?

The average high-temperature, in September, in Slaughter Beach, is 76.1°F, while the average low-temperature is 64°F. In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is estimated at 87.8°F.

What is the average humidity in September in Slaughter Beach?

In Slaughter Beach, Delaware, the average relative humidity in September is 79%.

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

In September, the rain falls for 13.5 days. Throughout September, 1.85" of precipitation is accumulated.

When it does not snow in Slaughter Beach?

In Slaughter Beach, snow does not fall in April, June through October.

How many hours of daylight does Slaughter Beach have in September?

The average day length in September in Slaughter Beach, Delaware, is 12h and 26min.

When are sunrise and sunset in September in Slaughter Beach?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:46 pm EDT.

How long on average sun shines in September in Slaughter Beach?

The average sunshine duration in September in Slaughter Beach is 9.4h.

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

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Slaughter Beach, DE

Average temperature in September - Slaughter Beach, DE
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

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Average pressure in September
Slaughter Beach, DE

Average pressure in September - Slaughter 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
Slaughter Beach, DE

Average wind speed in September - Slaughter Beach, DE
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is February (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in September
Slaughter Beach, DE

Average humidity in September - Slaughter Beach, DE
  • Average humidity in September: 79%

The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January and November (74%).

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Average rainfall in September
Slaughter Beach, DE

Average rainfall in September - Slaughter Beach, DE
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is August (3.07").
The driest month (with the least rainfall) is January (1.5").

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Average rainfall days in September
Slaughter Beach, DE

Average rainfall days in September - Slaughter Beach, DE
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in September
Slaughter Beach, DE

Average snowfall in September - Slaughter Beach, DE
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, June, July, August, September and October (0").

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Average snowfall days in September
Slaughter Beach, DE

Average snowfall days in September - Slaughter Beach, DE
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Slaughter Beach, DE
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in September
Slaughter Beach, DE

Average sunshine days in September - Slaughter Beach, DE
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is July (11.6 days).

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Average UV index in September
Slaughter Beach, DE

Average UV index in September - Slaughter 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
Slaughter Beach, DE

Average cloud cover in September - Slaughter Beach, DE
  • Average cloud cover in September: 32

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in September
Slaughter Beach, DE

Average visibility in September - Slaughter 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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Slaughter Beach, Delaware, USA

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