🔥 Trending Philadelphia Weather Forecast and Updates

The weather in Philadelphia, Pennsylvania, today, July 4th, 2026, is expected to be one of the hottest Fourth of Julys on record ⁶. The forecast indicates partly sunny conditions with a high temperature near 89°F (31.7°C) ². However, the heat index values could feel as high as 100°F (37.8°C) due to humidity ².

Precipitation and Storms

There is a chance of showers and thunderstorms, particularly after 2:00 PM ². The probability of precipitation is 30% ². New rainfall amounts could range between a tenth and a quarter of an inch, with potentially higher amounts in some areas ². Scattered to numerous strong to severe storms are possible this evening and tonight ⁶.

Wind Conditions

Winds are expected to be calm, becoming south around 5 mph in the afternoon ².

Historical Context

Historically, July 4th in Philadelphia has seen various temperatures. For instance, on July 4, 1776, when the Declaration of Independence was signed, the temperature recorded by Thomas Jefferson was 76°F (24.4°C) at 1:00 PM ⁸. Today's forecast of 89°F (31.7°C) with a heat index of 100°F (37.8°C) highlights the significant heat expected for this year's Independence Day celebrations ²⁶.