The temperature in Washington again touched 90 degrees on Friday, underscoring the observation by National Weather Service forecasters that “unusually warm weather has persisted over the area for quite some time.”

But a turning point may be at hand. The Weather Service’s local forecast office promised on Friday that temperatures reminiscent of this season rather than the previous one “will finally” show up this weekend.

They said readings at Reagan National Airport will probably dip below 60 for the first time since June 9 — 105 days ago. The 105 days is seven fewer than the 2012 record for consecutive days at or above 60, forecasters said.