First Frost Or Freeze Likely For Parts of PA Saturday & Sunday AM; See Low Temperatures Around PA

First Frost Or Freeze Likely For Parts of PA Saturday & Sunday AM; See Low Temperatures Around PA

Temperatures are cooling down earlier than normal this year. In fact, we are about two to three weeks ahead of schedule with this first freeze. In this article we will cover Saturday and Sunday morning lows, and will have an article out Sunday covering Monday and Tuesday morning forecast lows. Monday morning is expected to be the coldest morning of the bunch, so stay tuned for that update.

Frost Advisories and Freeze Warnings have been posted across much of northern PA for Saturday morning, however we could see these advisories drop farther south for Sunday or Monday morning. Here are those alerts for Saturday AM.

As stated by the NWS, “Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.”




Below are the low temperatures forecasts for Saturday and Sunday morning.

SATURDAY MORNING LOW TEMPERATURES

Anywhere in the dark red may see a frost or freeze. In the ridge and valley section of Pennsylvania, valleys will always drop 3-6+ degrees colder than surrounding ridges. So if you are low in a valley in that section, you may drop even lower than these numbers.




SUNDAY MORNING LOW TEMPERATURES

Sunday morning will be slightly colder than Saturday morning in the eastern two-thirds of the state, and warmer in western PA. Anywhere in the dark red may see a frost or freeze.

Cover or bring in any sensitive vegetation you can if in a location expected to see a frost of freeze.

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Josh Adams is the founder and lead forecaster of Pennsylvania Weather Action, a regional forecasting site he launched in 2015. With over a decade of experience analyzing weather patterns across Pennsylvania, his forecasts have reached millions of readers throughout the state. Josh specializes in Pennsylvania’s complex microclimates and terrain-driven weather patterns, providing detailed coverage of severe thunderstorms, winter storms, and flooding events. His forecasting focuses on delivering precise, timely information to help Pennsylvanians stay informed and prepared during impactful weather. Last Updated: March 10, 2026