September weather forecast
Frankford, DE

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Weather in September

September brings the onset of fall with a discernible change in weather conditions in Frankford. The average temperature goes down gradually in response to the coming fall, with high temperatures averaging at 75.9°F (24.4°C). A significant drop in daylight hours ensues, leading to cooler and shorter days. As summer winds down, the windy conditions also begin to pick up pace. The lower cloud cover also signifies the changing season, allowing for clearer skies.

Temperature

As Frankford steps into September, the average high-temperature is measured at a still moderately hot 75.9°F (24.4°C), displaying minor differences from August's 81°F (27.2°C). Throughout September, an average low-temperature of 65.7°F (18.7°C) is experienced.

Humidity

The average relative humidity in September is 79%.

Rainfall

In September, in Frankford, the rain falls for 13.5 days. Throughout September, 1.73" (44mm) of precipitation is accumulated. In Frankford, during the entire year, the rain falls for 146.8 days and collects up to 25.2" (640mm) of precipitation.

Snowfall

In Frankford, Delaware, snow does not fall in April through October.

Daylight

The average length of the day in September in Frankford is 12h and 25min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:30 pm. On the last day of September, in Frankford, sunrise is at 6:56 am and sunset at 6:44 pm EDT.

Sunshine

The average sunshine in September is 9.4h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 5 during September leads to these instructions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the temperature in September in Frankford?

The high-temperature in Frankford, Delaware, during September is 75.9°F (24.4°C) and the low-temperature is 65.7°F (18.7°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 86°F (30°C).

What is the average humidity in September in Frankford?

In September, the average relative humidity in Frankford is 79%.

How much does it rain in Frankford in September?

In September, in Frankford, Delaware, the rain falls for 13.5 days. Throughout September, 1.73" (44mm) of precipitation is accumulated.

When it does not snow in Frankford?

In Frankford, Delaware, snow does not fall in April through October.

What is the average length of the day in September in Frankford?

In Frankford, Delaware, the average day length in September is 12h and 25min.

When are sunrise and sunset in September in Frankford?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:30 pm. On the last day of the month, in Frankford, sunrise is at 6:56 am and sunset at 6:44 pm EDT.

How many hours of sunshine does Frankford have in September?

The average sunshine duration in September in Frankford is 9.4h.

What is the UV index reading in September in Frankford?

In Frankford, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from 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
Frankford, DE

Average temperature in September - Frankford, DE
  • Average high temperature in September: 75.9°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (41.7°F).

  • Average low temperature in September: 65.7°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

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Average pressure in September
Frankford, DE

Average pressure in September - Frankford, 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
Frankford, DE

Average wind speed in September - Frankford, DE
  • Average wind speed in September: 8.8mph

The windiest months (with the highest average wind speed) are January, February and March (11.1mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

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Average humidity in September
Frankford, DE

Average humidity in September - Frankford, DE
  • Average humidity in September: 79%

The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January and November (74%).

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Average rainfall in September
Frankford, DE

Average rainfall in September - Frankford, DE
  • Average rainfall in September: 1.73"

The wettest months (with the highest rainfall) are July and August (2.95").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in September
Frankford, DE

Average rainfall days in September - Frankford, DE
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in September
Frankford, DE

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

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

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Average snowfall days in September
Frankford, DE

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

The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Frankford, 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: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in September
Frankford, DE

Average sunshine days in September - Frankford, DE
  • Average sunshine days in September: 14.3 days

The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (12.2 days).

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Average UV index in September
Frankford, DE

Average UV index in September - Frankford, 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
Frankford, DE

Average cloud cover in September - Frankford, DE
  • Average cloud cover in September: 31

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in September
Frankford, DE

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

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