Washington
District of Columbia, USA
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
Washington, DC

Stunning reflective view of rows of jacaranda trees in spring in the tidal basin of the Washington Monument in DC
Stunning reflective view of rows of jacaranda trees in spring in the tidal basin of the Washington Monument in DC
July is the hottest month of the year, with peak temperatures of 88°F (31.1°C). Brilliant sunshine lasts 9.4 hours daily; avoid the scorching mid-day sun or take adequate protection with the sun's ultraviolet index shooting to a dangerous 9. Rain with thundershowers is frequent during the summer, but light enough to enjoy fun events like the Independence Day celebrations.
The bicycle-friendly tracks around the Potomac River are a fun way for tourists to explore Washington, D.C. during the summer.

What is the warmest month in Washington?

With an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 71.1°F (21.7°C), July is the warmest month.

What is the temperature in July in Washington?

In Washington, in July, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 71.1°F (21.7°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines relative humidity and air temperature, is evaluated at 99.3°F (37.4°C).

What is the average humidity in July in Washington?

The average relative humidity in July in Washington is 66.9%.

How many days does it rain in July in Washington?

In Washington, in July, during 10.3 rainfall days, 3.7" (94.7mm) of precipitation is typically accumulated.

When it does not snow in Washington?

April through October are months without snowfall in Washington.

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

The average length of the day in July in Washington is 14.6h.

How long on average sun shines in July in Washington?

In Washington, the average sunshine in July is 9h.

When is the highest UV index in Washington?

Months with the highest UV index are June and July, with an average maximum UV index of 9.

What is the UV index reading in July in Washington?

In July, the average daily maximum UV index in Washington, District of Columbia, is 9. A UV Index estimate of 8 to 10 represents a very high health risk from the exposure to the Sun's UV radiation.
Average temperature in July - Washington, DC
  • Average high temperature in July: 31.3°C

The warmest month (with the highest average high temperature) is July (31.3°C).
The month with the lowest average high temperature is January (6.3°C).

  • Average low temperature in July: 21.7°C

The month with the highest average low temperature is July (21.7°C).
The coldest month (with the lowest average low temperature) is January (-1.9°C).

Average humidity in July - Washington, DC
  • Average humidity in July: 66.9%

The month with the highest relative humidity is September (69.7%).
The month with the lowest relative humidity is April (58%).

Average rainfall in July - Washington, DC
  • Average rainfall in July: 94.7mm

The wettest month (with the highest rainfall) is May (101.3mm).
The driest month (with the lowest rainfall) is February (66.5mm).

Average rainfall days in July - Washington, DC
  • Average rainfall days in July: 10.3 days

The month with the highest number of rainy days is May (11.1 days).
The month with the lowest number of rainy days is October (7.7 days).

Average snowfall in July - Washington, DC
  • Average snowfall in July: 0mm

The month with the highest snowfall is February (144.8mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

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

The month with the highest number of snowfall days is January (3 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in July / Average sunshine in July - Washington, DC
  • Average daylight in July: 14.6h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.5h).

  • Average sunshine in July: 9h

The month with most sunshine is June (Average sunshine: 9.4h).
The month with least sunshine is December (Average sunshine: 4.3h).

Average UV index in July - Washington, DC
  • Average UV index in July: 9

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 2).