 your forecast after several days of wet weather we have some great conditions for the weekend thanks to low humidity not too common for late july so enjoy the weekend outdoors if you can temperatures mid to upper 80s close to 90 for saturday and sunday but the heat index will stay in the 80s thanks to the low humidity city open dc also starting on saturday so great conditions with sunny skies our uv index is still pretty high this time of year so have that sunscreen on as burn time is still around 15 minutes