September weather forecast
Arden, DE

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Weather in September

September, the first month of the autumn in Arden, is also a moderately hot month, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 59.9°F (15.5°C).

Temperature

September's onset introduces a mild reduction in the average high-temperature, from a warm 82.9°F (28.3°C) in August to a still moderately hot 76.3°F (24.6°C). Nighttime temperatures in Arden, Delaware, consistently average a moderate 59.9°F (15.5°C) during September.

Humidity

The average relative humidity in September in Arden is 77%.

Rainfall

In Arden, in September, during 13.3 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Arden, during the entire year, the rain falls for 168.9 days and collects up to 35.55" (903mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Arden, the average length of the day in September is 12h and 26min.
On the first day of September in Arden, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:45 pm EDT.

Sunshine

In September, the average sunshine in Arden, Delaware, is 8.8h.

UV index

The average daily maximum UV index in September in Arden is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
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Frequently asked questions

What are September temperatures in Arden?

In September, in Arden, the average high-temperature is 76.3°F (24.6°C), and the average low-temperature is 59.9°F (15.5°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is appraised at 89.6°F (32°C).

What is the average humidity in September in Arden?

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

How many days does it rain in September in Arden?

In Arden, during September, the rain falls for 13.3 days and regularly aggregates up to 2.4" (61mm) of precipitation.

When it does not snow in Arden?

June through September are months without snowfall in Arden, Delaware.

Does it snow in Arden in September?

In Arden, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Arden have in September?

The average day length in September in Arden is 12h and 26min.

When are sunrise and sunset in September in Arden?

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, in Arden, Delaware, sunrise is at 6:57 am and sunset at 6:45 pm EDT.

How many hours of sunshine does Arden have in September?

In September, the average sunshine duration is 8.8h.

What is the UV index reading in September in Arden?

In September, the average daily maximum UV index in Arden, Delaware, is 4. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
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
Arden, DE

Average temperature in September - Arden, DE
  • Average high temperature in September: 76.3°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

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Average pressure in September
Arden, DE

Average pressure in September - Arden, DE
  • Average pressure in September: 30.05"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
Arden, DE

Average wind speed in September - Arden, DE
  • Average wind speed in September: 5.8mph

The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in September
Arden, DE

Average humidity in September - Arden, DE
  • Average humidity in September: 77%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Arden, DE

Average rainfall in September - Arden, DE
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").

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Average rainfall days in September
Arden, DE

Average rainfall days in September - Arden, DE
  • Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in September
Arden, DE

Average snowfall in September - Arden, DE
  • Average snowfall in September: 0"

The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Arden, DE

Average snowfall days in September - Arden, DE
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Arden, DE

Average daylight in September / Average sunshine in September - Arden, 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 24min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in September
Arden, DE

Average sunshine days in September - Arden, DE
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is November (18.6 days).
The months with the least sunshine days are May and July (9.8 days).

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Average UV index in September
Arden, DE

Average UV index in September - Arden, DE
  • Average UV index in September: 4

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, February, November and December (UV index 2).

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Average cloud cover in September
Arden, DE

Average cloud cover in September - Arden, DE
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in September
Arden, DE

Average visibility in September - Arden, 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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Arden, Delaware, USA

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