July weather forecast
Wilmington, DE

Bright neon lights light up the Central Business District of Wilmington, Delaware, with a scenic reflection in the Christian River
Bright neon lights light up the Central Business District of Wilmington, Delaware, with a scenic reflection in the Christian River

Weather in July

July, like June, in Wilmington, Delaware, is another warm summer month, with average temperature ranging between max 84.9°F (29.4°C) and min 68.4°F (20.2°C).

Temperature

July is the warmest month, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 68.4°F (20.2°C).

Heat index

The average heat index in July is evaluated at a tropical 94.1°F (34.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, pregnancy), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in Wilmington is 74%.

Rainfall

In Wilmington, during 18.5 rainfall days, 3.58" (91mm) of precipitation is typically accumulated. In Wilmington, 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 in Wilmington.

Ocean temperature

In July, the average ocean temperature in Wilmington is 69.8°F (21°C).
Note: Swimming in 69.8°F (21°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In July, the average length of the day is 14.7h.

Sunshine

The month with the most sunshine is July, with an average of 10.6h of sunshine.

UV index

Months with the highest UV index in Wilmington are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 warmest month in Wilmington?

With an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 68.4°F (20.2°C), July is the warmest month in Wilmington.

What is the temperature in July in Wilmington?

The average high-temperature, in July, is 84.9°F (29.4°C), while the average low-temperature is 68.4°F (20.2°C). In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 94.1°F (34.5°C).

What is the average humidity in July in Wilmington?

In July, the average relative humidity is 74%.

How much does it rain in Wilmington in July?

In July, the rain falls for 18.5 days. Throughout July, 3.58" (91mm) of precipitation is accumulated.

When it does not snow in Wilmington?

June through September are months without snowfall.

How cold is the water in July in Wilmington?

In July, the average ocean temperature in Wilmington is 69.8°F (21°C). For most, swimming in 69.8°F (21°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

How many hours of daylight does Wilmington have in July?

In Wilmington, Delaware, the average length of the day in July is 14.7h.

What month has the most sunshine in Wilmington?

The month with the most sunshine is July, with an average of 10.6h of sunshine.

How long on average sun shines in July in Wilmington?

In July, the average sunshine in Wilmington, Delaware, is 10.6h.

What is the month with the highest UV index in Wilmington?

Months with the highest UV index in Wilmington are May through August, with an average maximum UV index of 6.

What is the UV index reading in July in Wilmington?

The average daily maximum UV index in July in Wilmington, Delaware, is 6. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in July
Wilmington, DE

Average temperature in July - Wilmington, DE
  • Average high temperature in July: 84.9°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 July: 68.4°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 July
Wilmington, DE

Average pressure in July - Wilmington, DE
  • Average pressure in July: 29.96"

The month with the highest atmospheric pressure is November (30.12").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in July
Wilmington, DE

Average wind speed in July - Wilmington, DE
  • Average wind speed in July: 5.5mph

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 July
Wilmington, DE

Average humidity in July - Wilmington, DE
  • Average humidity in July: 74%

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 July
Wilmington, DE

Average rainfall in July - Wilmington, DE
  • Average rainfall in July: 3.58"

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 July
Wilmington, DE

Average rainfall days in July - Wilmington, DE
  • Average rainfall days in July: 18.5 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 July
Wilmington, DE

Average snowfall in July - Wilmington, DE
  • Average snowfall in July: 0"

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

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Average snowfall days in July
Wilmington, DE

Average snowfall days in July - Wilmington, DE
  • Average snowfall days in July: 0 days

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

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Average sea temperature in July
Wilmington, DE

Average sea temperature in July - Wilmington, DE
  • Average sea temperature in July: 70°F

The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (34°F).

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Average daylight in July /
Average sunshine in July
Wilmington, DE

Average daylight in July / Average sunshine in July - Wilmington, DE
  • Average daylight in July: 14.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in July: 10.6h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in July
Wilmington, DE

Average sunshine days in July - Wilmington, DE
  • Average sunshine days in July: 9.8 days

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

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Average UV index in July
Wilmington, DE

Average UV index in July - Wilmington, DE
  • Average UV index in July: 6

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 July
Wilmington, DE

Average cloud cover in July - Wilmington, DE
  • Average cloud cover in July: 31

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 July
Wilmington, DE

Average visibility in July - Wilmington, DE
  • Average visibility in July: 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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