July weather forecast
Lewes, DE

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Weather in July

July, the height of summer, is characterized by warm temperatures and frequent sunshine. At 80.6°F (27°C), the high temperature marks a peak for the year, while the mornings are at the innocuous chill of 73°F (22.8°C). The weather makes a steady transition from June with humidity levels slightly declining, offering some respite from the summer heat. The longer sunshine hours and increased daylight continue to light up the city of Lewes. With the highest UV index for the year, sun protection becomes a must for residents and visitors alike.

Temperature

Lewes's temperatures tend to reach their peak averages in July, with a high of 80.6°F (27°C) and a low of 73°F (22.8°C).

Heat index

In July, the average heat index is calculated to be a hot 86°F (30°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.
Observations indicate that the heat index values are for shady locations with light wind. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

In July, the average relative humidity in Lewes is 79%.

Rainfall

In Lewes, in July, during 18.6 rainfall days, 3.78" (96mm) of precipitation is typically accumulated. In Lewes, during the entire year, the rain falls for 173.6 days and collects up to 36.97" (939mm) of precipitation.

Snowfall

April through October are months without snowfall in Lewes.

Ocean temperature

In July, the average ocean temperature is 75°F (23.9°C).
Note: Cold sensitivities vary, but with the right amount of sunshine, a gentle breeze, and a warm day, a swim in 75°F (23.9°C) waters might be just right. Remember, Olympic swimmers are used to waters between 77°F (25°C) and 82.4°F (28°C).

Daylight

In July, the average length of the day in Lewes is 14h and 34min.
On the first day of July in Lewes, sunrise is at 5:39 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:12 pm EDT.

Sunshine

With an average of 11h of sunshine, July has the most sunshine of the year in Lewes.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: In July, a daily maximum UV index of 6 leads to the following instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Be on guard! The reflective nature of sand and water boosts UV exposure.
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Frequently asked questions

What is the warmest month in Lewes?

July, characterized by an average high temperature of 80.6°F (27°C) and a low temperature of 73°F (22.8°C), is generally the warmest month in Lewes, Delaware.

What is the average July temperature in Lewes?

The high-temperature, in July, in Lewes, records 80.6°F (27°C), while the low-temperature is 73°F (22.8°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in July is calculated to be 86°F (30°C).

What is the average humidity in July in Lewes?

The average relative humidity in July in Lewes, Delaware, is 79%.

How many days does it rain in July in Lewes?

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?

In Lewes, Delaware, snow does not fall in April through October.

How warm is the water in July in Lewes?

In July, the average ocean temperature in Lewes, Delaware, is 75°F (23.9°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 75°F (23.9°C).

What is the average length of the day in July in Lewes?

The average day length in July is 14h and 34min.

When are sunrise and sunset in July in Lewes?

On the first day of July, sunrise is at 5:39 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:12 pm EDT.

What month has the most sunshine in Lewes?

With an average of 11h of sunshine, July has the most sunshine of the year in Lewes, Delaware.

How long on average sun shines in July in Lewes?

In July, the average sunshine duration is 11h.

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

The 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?

In July, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
75.4°F 24.1°C
80.6°F 27°C
79.5°F 26.4°C
Average low temperature
67.6°F 19.8°C
73°F 22.8°C
72.1°F 22.3°C
Average pressure
29.94" 760mmHg
29.96" 761mmHg
29.98" 761mmHg
Average wind speed
9.3mph 15km/h
8.4mph 13.5km/h
8.3mph 13.4km/h
Average max. wind speed
9.9mph 15.9km/h
8.9mph 14.3km/h
9mph 14.5km/h
Average wind speed gusts
15.9mph 25.6km/h
13.9mph 22.4km/h
13.4mph 21.6km/h
Average humidity
80%
79%
78%
Average rainfall
3.43" 87mm
3.78" 96mm
4.13" 105mm
Average rainfall days
17
18.6
18.2
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
68.2°F 20.1°C
75°F 23.9°C
76.9°F 24.9°C
Average daylight
14h 5min
14h 4min
13h 4min
Average sunshine
10h 3min
11h 0min
10h 4min
Average sunshine days
10.8
10.2
10
Average UV index
6
6
6
Average cloud cover
29%
26%
27%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

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"Hg

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

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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").
The 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).
The 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: 14h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • 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

The months with the highest UV index are May, June, July and August (UV index 6).
The 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

The 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

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

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Lewes, Delaware, USA

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