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

July weather forecast and Climate
Washington, DC

July is the hottest month of the year with the peak temperatures around 88°F (31.1°C). Brilliant sunshine lasts about 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 in 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. in the summer.
  • Average high temperature in July: 31.3°C

Warmest month (with highest average high temperature) is July (31.3°C).
Month with lowest average high temperature is January (6.3°C).

  • Average low temperature in July: 21.7°C

Month with highest average low temperature is July (21.7°C).
Coldest month (with lowest average low temperature) is January (-1.9°C).

  • Average humidity in July: 66.9%

Month with highest relative humidity is September (69.7%).
Month with lowest relative humidity is April (58%).

  • Average rainfall in July: 94.7mm

Wettest month (with highest rainfall) is May (101.3mm).
Driest month (with lowest rainfall) is February (66.5mm).

  • Average rainfall days in July: 10.3 days

Month with highest number of rainy days is May (11.1 days).
Month with lowest number of rainy days is October (7.7 days).

  • Average snowfall in July: 0mm

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

  • Average snowfall days in July: 0 days

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

  • Average daylight in July: 15h

Months with longest days are June and July (Average daylight: 15h).
Month with shortest days is December (Average daylight: 9h).

  • Average sunshine in July: 9h

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

  • Average UV index in July: 9

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