Baobab with winter rain

Hi anyone, I live in Perth Western Australia. Here we get winter rain and almost no summer rain. I have one 6 year old baobab (kremetartboom) in a pot and have been successful in keeping it safe in the winter rain so far but I had to transplant it into a larger pot. The plan I used to keep it dry last year is not going to work this year with this latest LARGE pot. (the pot is now immovable). Does anyone have a plan for the coming winter in 3 months time. I know it's still early days but I always seem to leave things till the last minute. We sometimes get weeks of constant winter rain and I'd hate to lose it now. Putting it under a roof is also now out of the question. It is about 7' high, it would have been much larger but I made many mistakes being inexperienced. I would appreciate a solution. Thanks, Annemarie

How about an umbrella like structure Wood posts and some rigid plastic sheeting over the top? Bolt it all togeather and it should be easily dismantled, with netting over it it might double up as summer shading