July weather forecast and climate
Lewes, DE

Weather in July

July, like June, in Lewes, Delaware, is another warm summer month, with temperature in the range of an average high of 80.6°F (27°C) and an average low of 73°F (22.8°C).

Temperature

July is the warmest month, with an average high-temperature of 80.6°F (27°C) and an average low-temperature of 73°F (22.8°C).

Heat index

The average heat index is calculated to be 85.3°F (29.6°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
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 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, clothing, wind, and pregnancy affect individual temperature impact. 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 particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in Lewes is 79%.

Rainfall

In Lewes, during July, the rain falls for 18.6 days and regularly aggregates up to 3.78" (96mm) of precipitation. Throughout the year, there are 173.6 rainfall days, and 36.97" (939mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Ocean temperature

In Lewes, in July, the average water temperature is 75°F (23.9°C).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75°F (23.9°C) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 77°F (25°C) to 82.4°F (28°C).)

Daylight

In July, the average length of the day in Lewes is 14.6h.

Sunshine

The month with the most sunshine in Lewes is July, with an average of 11h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the warmest month in Lewes?

July is the warmest month, with an average high-temperature of 80.6°F (27°C) and an average low-temperature of 73°F (22.8°C).

What is the temperature in July in Lewes?

The average high-temperature, in July, in Lewes, Delaware, is 80.6°F (27°C), while the average low-temperature is 73°F (22.8°C). In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 85.3°F (29.6°C).

What is the average humidity in July in Lewes?

In July, the average relative humidity is 79%.

How much does it rain in Lewes in July?

In Lewes, Delaware, in July, it is raining for 18.6 days, with typically 3.78" (96mm) of accumulated precipitation.

When it does not snow in Lewes?

April through October are months without snowfall in Lewes.

What is the water temperature in July in Lewes?

In Lewes, the average seawater temperature in July is 75°F (23.9°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 75°F (23.9°C) water.

How many hours of daylight does Lewes have in July?

In Lewes, the average length of the day in July is 14.6h.

What month has the most sunshine in Lewes?

The month with the most sunshine in Lewes is July, with an average of 11h of sunshine.

How many hours of sunshine does Lewes have in July?

In Lewes, the average sunshine in July is 11h.

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

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

How high is the UV index in July in Lewes?

The average daily maximum UV index in July in Lewes, Delaware, is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.

Average temperature in July
Lewes, DE

Average temperature in July - Lewes, DE
  • Average high temperature in July: 80.6°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (41.2°F).

  • Average low temperature in July: 73°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (32°F).

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Average pressure in July
Lewes, DE

Average pressure in July - Lewes, 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
Lewes, DE

Average wind speed in July - Lewes, DE
  • Average wind speed in July: 8.4mph

The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

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Average humidity in July
Lewes, DE

Average humidity in July - Lewes, DE
  • Average humidity in July: 79%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (73%).

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Average rainfall in July
Lewes, DE

Average rainfall in July - Lewes, DE
  • Average rainfall in July: 3.78"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.2").

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Average rainfall days in July
Lewes, DE

Average rainfall days in July - Lewes, DE
  • Average rainfall days in July: 18.6 days

The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is January (9.6 days).

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Average snowfall in July
Lewes, DE

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

The month with the highest snowfall is January (0.98").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in July
Lewes, DE

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

The month with the highest number of snowfall days is January (3.7 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average sea temperature in July
Lewes, DE

Average sea temperature in July - Lewes, DE
  • Average sea temperature in July: 75°F

The best month for swimming (with the highest average sea temperature) is August (76.9°F).
The coldest month (with the lowest average sea temperature) is February (40.7°F).

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

Average daylight in July / Average sunshine in July - Lewes, DE
  • Average daylight in July: 14.6h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in July: 11h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in July
Lewes, DE

Average sunshine days in July - Lewes, DE
  • Average sunshine days in July: 10.2 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (9.8 days).

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Average UV index in July
Lewes, DE

Average UV index in July - Lewes, 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 and December (UV index 2).

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Average cloud cover in July
Lewes, DE

Average cloud cover in July - Lewes, DE
  • Average cloud cover in July: 26

Months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in July
Lewes, DE

Average visibility in July - Lewes, 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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