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A few revolutionary footnotes When the Continental Congress convened on July 4, 1776, Thomas Jefferson's diary shows a high of 76° under cloudy skies--more spring-like than summer-sweltering. Philadelphia July 4, 1776, weather: What was it like when the US declared independence? Logs of weather observations from the 18th century can help us paint a picture of the weather on the nation's first Independence Day. In his memorandum books Jefferson recorded the purchase of almost twenty thermometers. On July 4, 1776, he bought one from Philadelphia merchant John Sparhawk for £3-15. Three days earlier he had begun his first surviving "meteorological diary." [1] For the rest of his life his daily routine included a thermometer check at dawn and in late afternoon — in his opinion, the coldest and warmest On July 4, Jefferson noted that the weather conditions in Philadelphia were cloudy with a high temperature of 76°F. For the next 50 years, he kept a meticulous weather journal. He recorded daily temperature data wherever he was – at home in Virginia or while traveling. What you might not realize is that July 4, 1776, was an unseasonably mild mid-summer day in usually hot and humid Philadelphia. By 9 a.m., the temperature was up to 72 degrees, and at 1 p.m. it was 76 degrees, according to the WeatherBug Web™ site. The Founding Fathers who gathered in Philadelphia to adopt the Declaration of Independence on July 4, 1776 picked a nice day to do their work. It was a Thursday, and the temperature at 6:00 a.m July 4, 1776 weather history Happy Independence Day, USA! Our country declared independence from Great Britain and King George the third 247 years ago on this very summer day. We bet you’re wondering what the weather was like that day. Wonder no more! On the Fourth of July in 1776, Jefferson recorded a low temperature of 68 degrees at 6 a.m., with clear skies and light northerly winds. By 9 a.m., it had warmed up to 72 degrees Philadelphia is, on average, hot and humid in July. However, the day the Declaration of Independence was signed, it was a comfortable 76 degrees around 1 p.m., thanks to a north wind. On July 4, 1776, Thomas Jefferson awoke to a cool Philadelphia summer morning: it was 20°C (68°F) at 6 am. In fact, we know the daily temperature where Jefferson was staying for almost every day of his adult life, thanks to his meticulous weather journals. Logs like these offer a glimpse of weather conditions in the recent past. But historic weather records are spotty and cannot tell us much Given that the current normal high temperature for Philadelphia for July 4 is 85°F, that would make sense (even if what would have been considered “normal” was a few degrees different in 1776). On July 4, 1776, Jefferson, in Philadelphia, recorded a 6:00 AM temperature of 68 degrees Fahrenheit, and a 1:00 PM temperature of 76 degrees Fahrenheit. He recorded no rain on that date. As you can see below, July 4, 1776, appeared to have very pleasant temperatures by early July standards, topping out in the mid-70s. (MORE: Weather When The US Declared Independence) On July 4, 1776, when the Declaration of Independence was adopted, the comfort of the Philadelphia weather was noteworthy. Despite the world-changing event on that Thursday, Jefferson was able to Incredibly, we have weather records from this historic day, taken by one of our Founding Fathers. Compared to modern temperature records, the 1776 high temperature of about 76 degrees is 9 degrees cooler than the 85 degree normal the city of Brotherly Love experiences. On July 4th, 1776, Thomas recorded temperatures 4 times throughout the day (despite what we can only assume was a very busy and emotional day). Another Philadelphia man by the name of W eather records actually exist from July 4, 1776, Independence Day, and they were taken by one of America's Founding Fathers. In 1776, weather observations were few and far between. July 4 events, cautions and trivia The Patriotic Skies event is set for Friday at Tuscawilla Park but keep an eye on the weather. Independence Day, commonly known as the Fourth of July, is a federal holiday in the United States which commemorates the ratification of the Declaration of Independence by the Second Continental Congress on July 4, 1776, establishing the United States of America.
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