September weather forecast and climate
Newark, DE

Weather in September

The first month of the autumn, September, is also a moderately hot month in Newark, Delaware, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 59.9°F (15.5°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 82.9°F (28.3°C) in August, to a still warm 76.5°F (24.7°C). In Newark, the average low-temperature is 59.9°F (15.5°C).

Humidity

Months with the highest humidity are May, September and October, with an average relative humidity of 78%.

Rainfall

In Newark, Delaware, during September, the rain falls for 13.7 days and regularly aggregates up to 2.36" (60mm) of precipitation. Throughout the year, there are 168.9 rainfall days, and 34.84" (885mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall in Newark.

Daylight

In September, the average length of the day in Newark is 12.4h.

Sunshine

The average sunshine in Newark, Delaware, is 9.1h.

UV index

In September, the average daily maximum UV index in Newark is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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 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 temperature in September in Newark?

The average high-temperature, in September, in Newark, is 76.5°F (24.7°C), while the average low-temperature is 59.9°F (15.5°C).

What are the most humid months in Newark?

May, September and October, with an average relative humidity of 78%, are most humid months in Newark.

What is the average humidity in September in Newark?

In Newark, Delaware, the average relative humidity in September is 78%.

How many days does it rain in September in Newark?

In September, in Newark, Delaware, the rain falls for 13.7 days. Throughout September, 2.36" (60mm) of precipitation is accumulated.

When it does not snow in Newark?

June through October are months without snowfall.

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

The average length of the day in September in Newark is 12.4h.

How long on average sun shines in September in Newark?

In September, the average sunshine in Newark, Delaware, is 9.1h.

How high is the UV index in September in Newark?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Newark, DE

Average temperature in September - Newark, DE
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

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Average pressure in September
Newark, DE

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

The month with the highest atmospheric pressure is November (30.13").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in September
Newark, DE

Average wind speed in September - Newark, DE
  • Average wind speed in September: 5.9mph

The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
Newark, DE

Average humidity in September - Newark, DE
  • Average humidity in September: 78%

Months with the highest relative humidity are May, September and October (78%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in September
Newark, DE

Average rainfall in September - Newark, DE
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is January (2.24").

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Average rainfall days in September
Newark, DE

Average rainfall days in September - Newark, DE
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is January (9.3 days).

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Average snowfall in September
Newark, DE

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

The month with the highest snowfall is March (2.76").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Newark, DE

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

The month with the highest number of snowfall days is January (5.4 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Newark, DE
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 9.1h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in September
Newark, DE

Average sunshine days in September - Newark, DE
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (9.7 days).

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Average UV index in September
Newark, DE

Average UV index in September - Newark, DE
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Newark, DE

Average cloud cover in September - Newark, DE
  • Average cloud cover in September: 35

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in September
Newark, DE

Average visibility in September - Newark, DE
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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