July weather forecastWilmington, DE
July
Weather in July
In Wilmington, the zenith of summer arrives with July, characterized by the year's highest temperatures, prolonged sunshine, and minimal cloud cover. The zenith temperature hits 84.9°F (29.4°C), a feature quintessentially July, generating the hottest month of the year. The sea is at its warmest, creating perfect conditions for water-based activities. August carries forward with the high-temperature trend, though with a slight dip, marking the onset of the end of the summer season.Temperature
July, known for its average high temperature of 84.9°F (29.4°C) and an average low temperature of 68.4°F (20.2°C), is the warmest month in Wilmington.Heat index
July's mean heat index is evaluated at a tropical 93.2°F (34°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a numerical representation of warmth when taking temperature and moisture levels into account. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In July, the average relative humidity is 74%.Rainfall
In Wilmington, Delaware, in July, it is raining for 18.5 days, with typically 3.58" (91mm) of accumulated precipitation. Throughout the year, in Wilmington, there are 168.9 rainfall days, and 35.55" (903mm) of precipitation is accumulated.Snowfall
In Wilmington, snow does not fall in June through September.Ocean temperature
In July, the average ocean temperature in Wilmington, Delaware, is 69.8°F (21°C).Note: A surface water temperature of 69.8°F (21°C) does not provide an enjoyable swimming experience for most. Breathing control becomes more challenging as the water temperature drops below 69.8°F (21°C).
Daylight
The average length of the day in July in Wilmington is 14h and 40min.On the first day of the month, sunrise is at 5:38 am and sunset at 8:34 pm. On the last day of July, sunrise is at 6:00 am and sunset at 8:16 pm EDT.
Sunshine
July has the most sunshine of the year, with an average of 10.6h of sunshine.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading 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, the maximum UV index of 6 suggests this advice:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
Average pressure in July
Wilmington, 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).
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).
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%).
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").
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).
Average snowfall in July
Wilmington, DE
- Average snowfall in July: 0"
The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August and September (0").
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).
The months with the least snowfall days are June, July, August and September (0 days).
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).
Average daylight in July /
Average sunshine in July
Wilmington, DE
- Average daylight in July: 14h and 42min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in July: 10h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
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).
The months with the least sunshine days are May and July (9.8 days).
Average UV index in July
Wilmington, 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, February, November and December (UV index 2).
Average cloud cover in July
Wilmington, DE
- Average cloud cover in July: 31
The 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).
Average visibility in July
Wilmington, 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).
