It looks like once western PA gets past this dreary and rainy weather the next couple days, high pressure will move in allowing for partly cloudy to mostly sunny skies to stick around from Friday through Monday. Highs in the 40s and low 50s today will drop into the upper 30s and low 40s on Thursday before a warming trend takes place back into the 40s and low 50s. Lows overnight will sit in the 30s for the rest of the work week before 20s and 30s move in during the weekend with clear skies.
For the DC Region, conditions will start to dry out on Thursday and give way to mostly sunny skies through the weekend. Highs will reach into the upper 50s to low 60s today before dropping into the upper 40s to low 50s tomorrow. Highs will hold in the 50s through the weekend. Lows will drop into the 40s the next couple nights before 30s could track in with clear skies during the weekend.