Philadelphia will start Wednesday under clear skies, with temperatures in the mid-40s. The afternoon is forecast to be mostly sunny, with a high around 67 and a light east wind. Those conditions should make for a mild commute and a break from heavier coats.
Clouds are expected to increase Wednesday night as temperatures fall to about 48. Thursday should be mostly sunny, with a high near 71. Friday is forecast to be the warmest day of the stretch, reaching about 73 under sunny skies and west winds of 5 to 10 mph.
Halloween Weekend Looks Mostly Dry
Saturday is forecast to be mostly sunny, with a high near 65 and light north winds. The dry weather should suit outdoor plans and Halloween errands. Saturday night turns mostly cloudy, with a low around 47 and no rain expected.
Rain Chances Return Next Week
Sunday is expected to stay mild, with partly sunny skies and a high near 68; clouds should build later in the day. Showers become possible after 1 a.m. Monday. Monday’s forecast calls for mostly cloudy skies, a high near 68 and a 40% chance of rain showers, with shower chances continuing Monday night and Tuesday.
How This Warm Spell Fits the Record
The Pennsylvania 2025 State Climate Summaries reports that the state’s annual average temperatures have risen more than 2°F since the beginning of the 20th century. That statewide annual trend does not establish a specific autumn trend for Philadelphia or explain this week’s forecast.
CBS Philadelphia reported that forecasters projected an 82-degree high in Philadelphia on Oct. 31, 2024, which could tie the city’s Halloween record set in 1946. That earlier projection differs from this year’s forecast.
No weather advisories are in effect for Philadelphia, and the broader forecast shows no significant weather concerns through the week. After several dry days, rain chances return early next week.
