D.C. Forecast: Summer heat & humidity arrive on schedule for the holiday weekend

This Afternoon: Mostly Sunny, Hot, Humid

Highs: 86-89 | Wind: SE 5-10 mph

Tonight: Partly Cloudy, Warm

Lows: 66-70 | Wind: S 5 mph

Saturday: AM Fog, Then Hot & Humid

Highs: 87-91 | Heat Index: Mid 90s

The whirring sound of air conditioners and the stifling humidity were sure signs across the Washington area yesterday that summer had indeed arrived.{ } The hottest day on the month - it was 86 at Reagan National - was a preview of what looks to be a torrid holiday weekend, with highs each day around 90. Additionally, high dew points will make it feel especially uncomfortable, and heat indices could reach the mid 90s.{ } Which means the seasonal precautions of staying hydrated, applying sunblock and avoiding exertion during the hottest parts of the day have become priorities again.

Relief from the heat could{ }come on Tuesday when{ }a cold front currently across the Great{ }Lakes is expected to impact the area. Its passage and a few showers{ }should drop temperatures 5-10 degrees.{ } High temperatures could drop into the 70s by week's end when yet another front could impact the area.

NOTE: While these projected 90 degree temperatures are well above the seasonal norm of 78, they're hardly unusual.{ } Just last year, which eventually registered as the hottest summer ever, the high readings for May 30, 31 and June 1 were 96, 98 and 98, respectively. Stay cool and enjoy your long weekend!