If you watch carefully the TV show, in some episodes you can see some puddles in Hazzard's streets, proving a previous rain (I think they avoided to film during the rain). Anyway, in a episode you can see raining during some scenes: "How to succeed in Hazzard". In that episode, at some point Daisy wears some boots for the rain, high and pinkish boot in rubber beside a large sweater (I remember it at the beninning of the episode). I guess it was a really cold and rainy day, since Catherine kept on those boots and large sweater (not her usual sexy outfit) for a while. In another episode, I noticed the white cloud of condensation coming out Enos and Rosco's mouth as they talk (proving it was a really really cod day). In that episode, no police cars crashing into the pond, LOL. I don't remember the episode, though. Maybe, "Dead and alive"? Moreover, I find interesting, looking at some pictures Roth posted in his amazing thread about the TV show "behind the scenes", that actors wore jackets, scarfs and sometimes also gloves while they waited for their turn in filming. They had to film just with shirts and trousers on, whereas they needed jackets behind the scenes... Poor Catherine, I think she suffered the cold, while she was acting.