After 35 90-degree days in Philadelphia, the prospect of a week free of mentions of heat index, extreme heat, or heat warnings should make a quite a few residents happy. While considerable humidity will appear on Tuesday, Friday and Saturday this week, the odds of a heat wave or a stretch of 90-degree days is rather remote. We could briefly flirt with 90 on either Monday, Tuesday, or Friday, but computer modeling from this point suggests highs won't reach that mark at all this week.
Despite the lack of heat in the coming days, there will be humidity (as we mentioned) and a few of rounds of thunderstorms moving through the region. The first will be Tuesday afternoon and evening as a cool front approaches. Humidity will increase on Tuesday in advance of the front, which will produce scattered afternoon and evening thunderstorms.
Some of those might be severe, producing heavy rainfall. We shouldn't see the levels of heavy rainfall we saw on late last week around the region, but Tuesday's storms especially could be something to look out for.
Wednesday marks a transition of lower humidity, to a nice Thursday, before we rinse and repeat with an increase of humidity on Friday. Another storm system will bring a chance of thunderstorms on Friday night into Saturday, with another shot of heavy to severe thunderstorm activity possible. In the wake of the second front, we might see some more pronounced cooler air working in. And by cooler, we're not talking anything that will require a jacket, but highs may not get much above 80 on Sunday or Monday of next week.