aug. 11

I drove my car to my morning exercise class because I had an oil change appointment afterwards. Fortunately, I had a meeting this evening so I still got to ride my bike. It was a beautiful day and I was inside all day, so it was really nice to get out at 6 pm. The temperature was 79, dewpoint down to 57 F, winds 7 mph from the north, and sunny. Here's the ole' bike path:

I was chilly on the return trip at 9 pm. Temperature was down to 67 F, according to the almanac. That doesn't seem so cold. But I bet it was colder where I was riding, in low-lying areas, where radiative cooling from the earth cools the air above it in calm conditions like we had.