Philadelphia is starting Monday under mostly cloudy skies and mild, muggy air, with temperatures in the low 70s early. The city should warm to about 84 degrees, but a few isolated showers could interrupt the day. The bigger weather story arrives Tuesday through Thursday, when heat, humidity and storm chances all ramp up.
Monday Stays Mostly Cloudy With A Few Showers
Monday’s shower odds remain low at about 20%, and most neighborhoods may stay dry. Any rain should be brief, with east winds generally staying between 0 and 5 mph before shifting more southeasterly later in the day.
Monday night will remain humid and mostly cloudy, with a low near 72 degrees and a slight chance of showers or thunderstorms. The National Weather Service says hazardous weather is unlikely Monday, though a brief heavy downpour cannot be ruled out.
Heat And Storm Threat Build Tuesday Through Thursday
Tuesday will be the first sharp turn, with partly sunny skies and a high near 91 degrees. Showers and thunderstorms could develop after 11 a.m., and the chance of rain rises to 50% Tuesday night, when some spots could pick up a quarter- to half-inch of rain.
Wednesday brings another warm day near 87 degrees, along with a 50% chance of showers and thunderstorms. Thursday could again reach 91 degrees, with storms possible after an early chance of rain showers.
Forecasters are warning that multiple rounds of storms could affect the region from Tuesday through Thursday, with an increasing risk of damaging winds, large hail, flash flooding and, in some setups, tornadoes. No watches or warnings are posted for Philadelphia right now, but the forecast discussion says storm timing and intensity remain uncertain and could change.
Cooler, Drier Weather Arrives For Labor Day Weekend
The pattern improves Friday, when Philadelphia should see mostly sunny skies and a high near 84 degrees, although a stray afternoon shower is possible. Overnight temperatures will fall to about 66 degrees.
Saturday and Sunday look more comfortable, with highs near 80 and 79 degrees, respectively, and lower humidity. Both days should be mostly sunny, though a slight chance of afternoon showers remains in the forecast.
The latest outlook is a notable update from Hoodline’s earlier forecast: the week now includes a clearer midweek severe-weather concern before the cooler holiday weekend arrives.
