Since NYC is the venue for much of the series, I enjoy perusing photos of it in all seasons. I have the New York Weather Underground site downloaded. When I am using a specific day/date in the series I always check to see what the weather was on that particular day. So if I say that it was a cold and windy day in Manhattan on November 7, 1987, it was indeed a cold and windy day. I love details. Do you ever check details like names of towns etc when you are reading? Even with fiction, so often it will be loosely fact based and you can unearth some interesting information.