August weather forecast and climate
Delaware, NJ

Weather in August

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

Temperature

In August, the average high-temperature is practically the same as in July - a still warm 80.2°F (26.8°C). In August, the average low-temperature is 59.4°F (15.2°C).

Humidity

The average relative humidity in Delaware, New Jersey, is 78%.

Rainfall

In Delaware, during 15.6 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Delaware, New Jersey, during the entire year, the rain falls for 165.9 days and collects up to 31.61" (803mm) of precipitation.

Snowfall

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

Daylight

In Delaware, New Jersey, the average length of the day in August is 13.7h.

Sunshine

The average sunshine in August is 9.9h.

UV index

In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 5 in August interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in August in Delaware?

In August, the average high-temperature is 80.2°F (26.8°C), and the average low-temperature is 59.4°F (15.2°C).

What is the average humidity in August in Delaware?

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

How many days does it rain in August in Delaware?

In Delaware, in August, during 15.6 rainfall days, 2.6" (66mm) of precipitation is typically accumulated.

When it does not snow in Delaware?

June through September are months without snowfall.

How many hours of daylight does Delaware have in August?

The average length of the day in August in Delaware, New Jersey, is 13.7h.

How many hours of sunshine does Delaware have in August?

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

What is the UV index reading in August in Delaware?

The average daily maximum UV index in August in Delaware is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

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).

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Average pressure in August
Delaware, NJ

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

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

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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).

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Average humidity in August
Delaware, NJ

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

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

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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").

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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).

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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").
Months with the least snowfall are June, July, August and September (0").

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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).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Delaware, NJ
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in August: 9.9h

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 4.3h).

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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).

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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).

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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).

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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).
Months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

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