August weather forecast
Delaware, NJ

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Weather in August

The last month of the summer, August, is also a moderately hot month in Delaware, New Jersey, with an average temperature varying between 80.2°F (26.8°C) and 59.4°F (15.2°C).

Temperature

August's average high-temperature is a still warm 80.2°F (26.8°C), maintaining a close comparison with July's 82.2°F (27.9°C). Delaware registers a consistent average low-temperature of 59.4°F (15.2°C) during August.

Humidity

In Delaware, New Jersey, the average relative humidity in August is 78%.

Rainfall

In Delaware, in August, it is raining for 15.6 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, in Delaware, there are 165.9 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Delaware, New Jersey.

Daylight

The average length of the day in August is 13h and 46min.
On the first day of the month, sunrise is at 5:57 am and sunset at 8:15 pm. On the last day of August, in Delaware, sunrise is at 6:26 am and sunset at 7:33 pm EDT.

Sunshine

In August, the average sunshine is 9.9h.

UV index

In Delaware, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: In August, a regular UV index of 5 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. It's recommended to limit sun exposure when its radiation is at its peak during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Delaware in August?

The average high-temperature, in August, in Delaware, is 80.2°F (26.8°C), while the average low-temperature is 59.4°F (15.2°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in July is evaluated at 87.8°F (31°C).

What is the average humidity in August in Delaware?

The average relative humidity in August is 78%.

How much does it rain in Delaware in August?

In Delaware, during August, the rain falls for 15.6 days and regularly aggregates up to 2.6" (66mm) of precipitation.

When it does not snow in Delaware?

In Delaware, snow does not fall in June through September.

How many hours of daylight does Delaware have in August?

In August, the average day length in Delaware is 13h and 46min.

When are sunrise and sunset in August in Delaware?

On the first day of August in Delaware, sunrise is at 5:57 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:33 pm EDT.

How long on average sun shines in August in Delaware?

In Delaware, New Jersey, the average sunshine duration in August is 9.9h.

What is the UV index intensity in August in Delaware?

In August, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability 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 August
Delaware, NJ

Average temperature in August - Delaware, NJ
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in August: 59.4°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in August
Delaware, NJ

Average pressure in August - Delaware, NJ
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Delaware, NJ

Average wind speed in August - Delaware, NJ
  • Average wind speed in August: 4.9mph

The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in August
Delaware, NJ

Average humidity in August - Delaware, NJ
  • Average humidity in August: 78%

The months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).

Average rainfall in August
Delaware, NJ

Average rainfall in August - Delaware, NJ
  • Average rainfall in August: 2.6"

The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in August
Delaware, NJ

Average rainfall days in August - Delaware, NJ
  • Average rainfall days in August: 15.6 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (9.5 days).

Average snowfall in August
Delaware, NJ

Average snowfall in August - Delaware, NJ
  • Average snowfall in August: 0"

The month with the highest snowfall is February (5.67").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Delaware, NJ

Average snowfall days in August - Delaware, NJ
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Delaware, NJ

Average daylight in August / Average sunshine in August - Delaware, NJ
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in August
Delaware, NJ

Average sunshine days in August - Delaware, NJ
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is June (11.1 days).

Average UV index in August
Delaware, NJ

Average UV index in August - Delaware, NJ
  • Average UV index in August: 5

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in August
Delaware, NJ

Average cloud cover in August - Delaware, NJ
  • Average cloud cover in August: 37

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 35).

Average visibility in August
Delaware, NJ

Average visibility in August - Delaware, NJ
  • Average visibility in August: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

Delaware, New Jersey, USA

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