AccuWeather Alert: Tracking our first heat wave, record highs in the Philadelphia region

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Tuesday, May 19, 2026 8:22AM
AccuWeather Alert: Tracking our first heat wave, record highs

PHILADELPHIA (WPVI) -- Heat waves ends tomorrow with the chance for a few stronger storms possible.

TODAY: Record warmth with sunny skies, high 98. This would be the all-time hottest May high on record for Philadelphia.

An isolated shower or storm can't be ruled out through the afternoon/evening, mainly northwest of I-95.

TONIGHT: Very warm and muggy, temperatures near an average high for this time of the year. Low 74.

WEDNESDAY: Hot and very humid, high 96. With a cold front approaching from the west, we'll watch for scattered showers and storms.

THURSDAY: A few showers early may linger well south of the city. Otherwise, it's much cooler with breaks of sun, high 67.

FRIDAY: Easterly wind helps lock in more clouds than sun with some late-day showers, high 64.

SATURDAY: Mostly cloudy with showers possible, high 62.

SUNDAY: Mostly cloudy with showers possible, high 70.

MONDAY (MEMORIAL DAY): Some breaks of sunshine, with more showers possible, high 75.

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