If you think it rains every weekend, you're nearly right.

Drizzle, shower or downpour - rain is some form - has fallen in five of the past seven weekends. Since the beginning of the year, it has fallen - however briefly - at least one day for 23 of the past 31 weekends.

Meteorologists at the National Weather Service say "there is no meteorological reason for why rain falls on Saturdays and Sundays. The storm systems that bring the rain just happen to be in the area on weekends."

Forecasters said that the stidky weather that has plagued the area will abate somewhat today, with milder temperatures and loser humidity. The respite will be brief, however, with a return of hot, humid, steambath conditions forecase for tomorrow.

The meteorologists' forecast that the weather will brighten today, becoming mostly sunny and less humid. On Tuesday, the forecast is for partly cloudy skies.

Although rain has fallen on so many Washington weekends, the total amount recorded here so far this year is only 4.33 inches above average for the year - 26.33 inches as compared with the average 22 inches.

Scattered showers fell on Washington yesterday, leaving .16 of rain by 8:30 p.m. On Saturday, meteorologists measured .23 inches of rain at National airport. So far, in July, 3.37 inches of rain have fallen, nearly one inch less than average.