CWS Forecast: Ridge and Valley Region 

After a soggy Sunday which provided much-needed rain to Pennsylvania, high pressure will build across the Commonwealth, with the sun finally returning today. The high pressure will allow for a northwesterly flow to maintain its grip over the region for the first part of the week, keeping the state’s temperatures well below-average for this time of year. There is the potential for frost formation through Thursday north and west, particularly overnight tonight. Tuesday will be on the breezy side. Some moisture off of Lake Erie is possible, and with very cold air aloft, some wet snow flakes mixing in isn’t out of the question north of I-80. On the bright side, the sun will dominate the region overall, with afternoon highs creeping up a bit each day and returning to around average by the end of the week.

Day One: Tuesday, May 11th 2021

Mostly cloudy throughout the day with patches of sunshine.  Remaining partly cloudy overnight.

High: 60°F

Low: 39°F 

Day Two: Wednesday, May 12th 2021

Partly cloudy throughout the day. Clouds will clear out overnight.

High: 59°F

Low: 40°F

Day Three: Thursday, May 13th 2021

Mostly clear throughout the day with a lot of sunshine.  Skies will remain mostly clear overnight.

High: 59°F

Low: 39°F

Day Four: Friday, May 14th 2021

A mix of sun and clouds during the day clearing overnight.

High: 63°F

Low: 40°F

Day Five: Saturday, May 15th 2021

Partly cloudy throughout the day with an isolated shower possible.  Clouds will clear out overnight.

High: 62°F

Low: 42°F

Last Updated on May 9, 2021 at 8:01 pm