From the ABC 7 Weather team

What was the weather like on July 4, 1776 in Philadelphia?

July 3, 2013 - 11:55 AM
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When the Declaration of Independence was signed in Philadelphia on July 4, 1776, what was the weather like?

Have you ever thought what the weather was like in 1776 when the Declaration of Independence was being signed? Fortunately, one of our founding fathers was a weather enthusiast, so that information is available from one of his journals. This just happened to be Thomas Jefferson, who drafted the Declaration between June 11 and June 28, 1776.

Journal of Thomas Jefferson from July 1776

Above is a look at Thomas Jefferson's weather observations for the first 14 days in July in 1776. This gives an idea of the weather on the 4th, when the Declaration was signed. It reads:

6am:  68°         9am:  72.25°         1pm:  76°        9pm:  73.5°

It's pretty crazy to think that we have reliable weather data which dates all the way back to 1776. And it only hit 76 degrees, though the temperature could have been higher through the afternoon hours. He typically took temperatures when he woke up and once in the afternoon closer to 3pm or 4pm. Here's a link where you can read more about Jefferson's weather observing, which he did daily with most observations in Virginia at Monticello and in Williamsburg.

Fun Facts about the 4th of July from Census.gov

More about the Declaration of Independence

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