Appliance of Science: If a cow sits down does that mean it will rain?

We’ve all grown up with a few sayings that we may believe without ever questioning how likely they are to be true. I may not go around counting magpies anymore (well not out loud anyway), but I do catch myself looking for rain clouds if I see a field of cows lying down. Is there are science to back up some of the folklore we have grown up with?

If cows lie down it is going to rain?