June weather forecast and climate
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
The first month of the summer, June, is a moderately hot month in Wilmington, Delaware, with average temperature ranging between max 79.5°F (26.4°C) and min 62.8°F (17.1°C).

Temperature

In Wilmington, the average high-temperature marginally rises, from an agreeable 71.6°F (22°C) in May, to a warm 79.5°F (26.4°C). In June, in Wilmington, the average low-temperature is 62.8°F (17.1°C).

Humidity

The average relative humidity in Wilmington is 75%.

Rainfall

In June, the rain falls for 17.5 days. Throughout June, 3.07" (78mm) of precipitation is accumulated. 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 June, the average ocean temperature is 60.8°F (16°C).
Note: For swimming, a surface water temperature of 60.8°F (16°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

The month with the longest days in Wilmington is June, with an average of 15h of daylight.

Sunshine

In Wilmington, the average sunshine in June is 10h.

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 estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the UV radiation for the average person.
Note: In June, 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. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.

What is the temperature in June in Wilmington?

The average high-temperature, in June, in Wilmington, is 79.5°F (26.4°C), while the average low-temperature is 62.8°F (17.1°C).

What is the average humidity in June in Wilmington?

The average relative humidity in June in Wilmington, Delaware, is 75%.

How many days does it rain in June in Wilmington?

In Wilmington, Delaware, in June, during 17.5 rainfall days, 3.07" (78mm) of precipitation is typically accumulated.

Does it snow in Wilmington in June?

In June, in Wilmington, it doesn't snow. May is the latest month when it typically snows.

When it does not snow in Wilmington?

In Wilmington snow does not fall in June through September.

How cold is the water in June in Wilmington?

In Wilmington, the average seawater temperature in June is 60.8°F (16°C). For swimming, a surface water temperature of 60.8°F (16°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

When are the longest days in Wilmington?

June has the longest days of the year, with an average of 15h of daylight.

How many hours of daylight does Wilmington have in June?

In June, the average length of the day in Wilmington is 15h.

How long on average sun shines in June in Wilmington?

In Wilmington, Delaware, the average sunshine in June is 10h.

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.

How high is the UV index in June in Wilmington?

The average daily maximum UV index in June in Wilmington, Delaware, is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in June - Wilmington, DE
  • Average high temperature in June: 79.5°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 June: 62.8°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 June - Wilmington, DE
  • Average pressure in June: 29.94"

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

Average wind speed in June - Wilmington, DE
  • Average wind speed in June: 6.3mph

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 June - Wilmington, DE
  • Average humidity in June: 75%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in June - Wilmington, DE
  • Average rainfall in June: 3.07"

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 June - Wilmington, DE
  • Average rainfall days in June: 17.5 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 June - Wilmington, DE
  • Average snowfall in June: 0"

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

Average snowfall days in June - Wilmington, DE
  • Average snowfall days in June: 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).

Average sea temperature in June - Wilmington, DE
  • Average sea temperature in June: 61°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 June / Average sunshine in June - Wilmington, DE
  • Average daylight in June: 15h

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 June: 10h

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

Average sunshine days in June - Wilmington, DE
  • Average sunshine days in June: 9.9 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).

Average UV index in June - Wilmington, DE
  • Average UV index in June: 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).

Average cloud cover in June - Wilmington, DE
  • Average cloud cover in June: 36

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 June - Wilmington, DE
  • Average visibility in June: 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).