It is so that WA Perth has a very low humidity so you don't get many contrails there... if this is so what do I see and read on internet? Perth and Esperance coping a serve of something from planes and they were back on the South Coast today??????????



Oh really, the south coast?

We don't get many contrails, but there are conditions when they are apparent, this day was in summer, and we may have had a humid spell.