 And partly cloudy tonight, still looking at a northerly wind by Monday. However, temperatures going up 91 to 97 degrees. 97 in the district with heat index temperatures 100 to 105 degrees. 7 News Chief Meteorologist Veronica Johnson in the First Alert Weather Center. Right now it's 86 degrees in Gaithersburg, 85 in Arlington and 87 degrees in Lanham.