Philadelphia, PA – A frost advisory is in effect across the Philadelphia region from 2 a.m. to 9 a.m. Monday, with temperatures expected to dip as low as 33°F. Residents are urged to take immediate precautions to protect sensitive plants from potential frost damage. These conditions highlight a significant change from the warmer fall temperatures earlier this month, as cold air sweeps through Pennsylvania, New Jersey, and Delaware.
According to the National Weather Service in Mount Holly, NJ, this advisory affects areas including Philadelphia, Delaware, and parts of coastal New Jersey. Sensitive vegetation and outdoor plants are at risk of frost, which could result in damage or loss if left uncovered. Residents in the affected areas are encouraged to cover plants, move them indoors if possible, and avoid planting new, frost-sensitive vegetation until warmer conditions return.
The frost advisory is part of a broader weather trend, with low temperatures expected to linger through Monday morning. A gradual warming trend is anticipated as the week progresses. Monday’s daytime high is forecasted to reach 64°F with sunny skies, providing some respite from the overnight chill. By midweek, temperatures are projected to rise further, with highs reaching 76°F on Wednesday and 80°F on Thursday under mostly sunny skies.
In addition to the frost advisory, a special weather statement warns of an increased fire spread risk in eastern Pennsylvania and New Jersey. Relative humidity is expected to drop to 20–30% with winds of 5–10 mph, creating dry conditions conducive to wildfire spread. Residents are advised to avoid outdoor burning and exercise caution with potential ignition sources.