Another nice day on tap as high pressure remains locked in across the Northeast, and with a good bit of sunshine temperatures will climb into the 70s once again.
Clouds will slowly begin to increase later in the day, however, as an upper level trough moves across the Ohio Valley and moisture streams eastward ahead of it.
The clouds will thicken overnight as the flow becomes easterly and the upper-level disturbance moves closer, thus overnight lows will hold in the lower 50s. Timing the arrival of rainfall will be problematic, but most guidance suggests that wet weather will be had by Monday afternoon, and so the forecast follows suit.
Temperatures will range from the mid 50s to the east to the low/mid 60s toward D.C. In any case, it’s much cooler than Sunday, and the cool weather will take hold through the middle of the week as easterly flow keep clouds locked in.