June weather forecast and climate
Washington, DC

Rows of jacaranda trees in spring in the tidal basin of the Washington Monument in Washington city, DC, USA
Rows of jacaranda trees in spring in the tidal basin of the Washington Monument in Washington city, DC, USA
The first month of the summer, June, is also a moderately hot month in Washington, District of Columbia, with average temperature fluctuating between 64.2°F (17.9°C) and 82.8°F (28.2°C).

Temperature

In June, the average high-temperature slightly increases, from 74.5°F (23.6°C) in May, to a still moderately hot 82.8°F (28.2°C). In June, the average low-temperature is 64.2°F (17.9°C).

Heat index

The average heat index is evaluated at a hot 88.7°F (31.5°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. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, pregnancy, wind). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In June, the average relative humidity in Washington, District of Columbia, is 73%.

Rainfall

In Washington, District of Columbia, during June, the rain falls for 14.2 days and regularly aggregates up to 2.4" (61mm) of precipitation. Throughout the year, in Washington, there are 149.1 rainfall days, and 26.14" (664mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Washington.

Daylight

The month with the longest days in Washington is June, with an average of 14.9h of daylight.

Sunshine

In June, the average sunshine in Washington, District of Columbia, is 10.2h.

UV index

June is the month with the highest UV index, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In June, the average maximum UV index of 7 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 Washington?

The average high-temperature, in June, in Washington, is 82.8°F (28.2°C), while the average low-temperature is 64.2°F (17.9°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that combines both air temperature and relative humidity, in June is calculated to 88.7°F (31.5°C).

What is the average humidity in June in Washington?

The average relative humidity in June in Washington, District of Columbia, is 73%.

How many days does it rain in June in Washington?

In Washington, in June, during 14.2 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When it does not snow in Washington?

April through November are months without snowfall in Washington.

When are the longest days in Washington?

The month with the longest days in Washington is June, with an average of 14.9h of daylight.

How many hours of daylight does Washington have in June?

In June, the average length of the day in Washington is 14.9h.

How long on average sun shines in June in Washington?

In Washington, the average sunshine in June is 10.2h.

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

June is the month with the highest UV index, with an average maximum UV index of 7.

How high is the UV index in June in Washington?

In Washington, the average daily maximum UV index in June is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.
Average temperature in June - Washington, DC
  • Average high temperature in June: 82.8°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in June: 64.2°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).

Average pressure in June - Washington, DC
  • Average pressure in June: 29.95"

The month with the highest atmospheric pressure is November (30.14").
The month with the lowest atmospheric pressure is June (29.95").

Average wind speed in June - Washington, DC
  • Average wind speed in June: 5.8mph

The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in June - Washington, DC
  • Average humidity in June: 73%

The month with the highest relative humidity is May (76%).
Months with the lowest relative humidity are April and July (71%).

Average rainfall in June - Washington, DC
  • Average rainfall in June: 2.4"

The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.57").

Average rainfall days in June - Washington, DC
  • Average rainfall days in June: 14.2 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.1 days).

Average snowfall in June - Washington, DC
  • Average snowfall in June: 0"

The month with the highest snowfall is January (2.17").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in June - Washington, DC
  • Average snowfall days in June: 0 days

Months with the highest number of snowfall days are January and February (3.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in June / Average sunshine in June - Washington, DC
  • 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: 9.5h).

  • Average sunshine in June: 10.2h

The month with the most sunshine is July (Average sunshine: 10.7h).
Months with the least sunshine are January, February and December (Average sunshine: 5.1).

Average sunshine days in June - Washington, DC
  • Average sunshine days in June: 14 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.8 days).

Average UV index in June - Washington, DC
  • Average UV index in June: 7

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in June - Washington, DC
  • Average cloud cover in June: 33

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

Average visibility in June - Washington, DC
  • Average visibility in June: 6mi

Months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).