Philadelphia, PA Weather
Today's Forecast
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms between 1am and 3am, then patchy fog and a chance of showers and thunderstorms between 3am and 5am, then patchy fog and a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. East wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
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Data from the National Weather Service
Last updated Sat, Aug 22, 11:53 PM UTC
Winter in Philadelphia
Philadelphia averages 16 inches of snow a year, according to NOAA’s 1991–2020 climate normals — a occasional snow place. Snow is a few-times-a-year event. Limited equipment means modest amounts cause real disruption.
That is why local snowfall thresholds differ so much from one town to the next: a district that plans for 16 inches a year is equipped differently from one that never sees any. Here, roughly 2 inches in a single storm is where a normal school day comes under threat.
Upper air over Philadelphia
The nearest radiosonde launch is Upton, about 136 miles away. A weather balloon goes up twice a day and measures temperature, humidity and wind all the way through the atmosphere — which is what forecasters actually read to judge whether storms will fire, and how a surface forecast was arrived at.