June weather forecast and climate
New Castle, DE

June, the first month of the summer, in New Castle, is a warm month, with average temperature varying between 80.1°F (26.7°C) and 63.1°F (17.3°C).

Temperature

In June, the average high-temperature slightly increases, from a pleasant 72°F (22.2°C) in May, to a moderately hot 80.1°F (26.7°C). The average low-temperature, in New Castle, is 63.1°F (17.3°C).

Humidity

In June, the average relative humidity is 76%.

Rainfall

In New Castle, Delaware, it is raining for 14.3 days, with typically 2.01" (51mm) of accumulated precipitation. Throughout the year, there are 143.2 rainfall days, and 21.89" (556mm) of precipitation is accumulated.

Snowfall

In New Castle snow does not fall in May through October.

Ocean temperature

In New Castle, the average seawater temperature is 66.6°F (19.2°C).
Note: For swimming, a surface water temperature of 66.6°F (19.2°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

With an average of 14.9h of daylight, June has the longest days of the year.

Sunshine

In June, the average sunshine in New Castle is 10.1h.

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 health risk from unsafe exposure to the UV radiation for average individuals.
Note: In June, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in June in New Castle?

In New Castle, Delaware, in June, the average high-temperature is 80.1°F (26.7°C), and the average low-temperature is 63.1°F (17.3°C).

What is the average humidity in June in New Castle?

In New Castle, the average relative humidity in June is 76%.

How much does it rain in New Castle in June?

In New Castle, Delaware, in June, it is raining for 14.3 days, with typically 2.01" (51mm) of accumulated precipitation.

When it does not snow in New Castle?

May through October are months without snowfall in New Castle, Delaware.

What is the ocean temperature in June in New Castle?

In June, the average ocean temperature in New Castle is 66.6°F (19.2°C). Swimming in 66.6°F (19.2°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

When are the longest days in New Castle?

With an average of 14.9h of daylight, June has the longest days of the year in New Castle, Delaware.

What is the average length of the day in June in New Castle?

The average length of the day in June in New Castle is 14.9h.

How many hours of sunshine does New Castle have in June?

The average sunshine in June is 10.1h.

What are the months with the highest UV index in New Castle?

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

What is the UV index intensity in June in New Castle?

In New Castle, the average daily maximum UV index in June is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in June - New Castle, DE
  • Average high temperature in June: 80.1°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 (37.8°F).

  • Average low temperature in June: 63.1°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in June - New Castle, DE
  • Average pressure in June: 29.94"

The month with the highest atmospheric pressure is November (30.13").
The month with the lowest atmospheric pressure is June (29.94").

Average wind speed in June - New Castle, DE
  • Average wind speed in June: 6.5mph

The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in June - New Castle, DE
  • Average humidity in June: 76%

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

Average rainfall in June - New Castle, DE
  • Average rainfall in June: 2.01"

The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is January (1.38").

Average rainfall days in June - New Castle, DE
  • Average rainfall days in June: 14.3 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in June - New Castle, DE
  • Average snowfall in June: 0"

The month with the highest snowfall is January (1.69").
Months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in June - New Castle, DE
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (5.2 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in June - New Castle, DE
  • Average sea temperature in June: 66.6°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).

Average daylight in June / Average sunshine in June - New Castle, DE
  • Average daylight in June: 14.9h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in June: 10.1h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in June - New Castle, DE
  • Average sunshine days in June: 13 days

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in June - New Castle, 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 - New Castle, DE
  • Average cloud cover in June: 35

Months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in June - New Castle, 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).