Our southeast PA forecast region includes Philadelphia, Doylestown, West Chester, Lancaster, York, Gettysburg & surrounding areas. Forecasts are updated daily M-F and Saturday that covers both weekend days – not Sunday.

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Ridging to build back in late week... 

Humidity ticks up slightly Wednesday with a mix of sun and clouds expected and wind direction turning to the south. Highs will reach the middle 80s this afternoon which is still very slightly below average for this time of year, then partly cloudy skies overnight.

Ridging will build into the region late in the week as high pressure moves offshore. We approach 90° with more humid conditions Thursday but still mostly sunny, then the peak heating day appears to be Friday this week as a cold front approaches the region and highs in the middle 90s. An evening thunderstorm will be possible Friday, but will depend on timing of that front. A better chance for scattered thunderstorms both weekend days as that cold front slowly works through the region, favoring the afternoons/evenings after at least some sun to start. Back to partly cloudy skies Monday with still hot temperatures, then another cold front approaches Tuesday with isolated PM thunderstorms possible.

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Forecaster: Martrich 23 July 0300z

Daily Climatology for Philadelphia, PA

Average high	Average low	Record high temp (year)	Record low temp (year)
88°F	70°F	101°F (2011)	58°F (1950)