No, there is no such thing as fate. What we just witnessed was the revolution of several cycles dancing around each other. There were consistent cycles such as Johnny's urinary tract and weather patterns that were affecting this event. And it is true that if they were the only aspects of this story, fate would have to exist. However, there were also random events, for example Scotty's decision to urinate on that tree instead of another or the bottle of Aquafina being placed in the spot where it becomes the coldest, if either of these were not to have happened then Johnny would still be alive.
Some events turn into cycles.
Seeing as trees do not have brains, this informs us that they do not have the ability to think. If the tree cannot think then it could not pass the message to the weather system, also a part of nature that has no brain. Therefore, even if the tree had a brain and the ability to communicate it wouldn't be able to pass on this information to weather, because like I just mentioned weather has no brain. Therefore Johnny's death is a matter of coincidence. This is my proof of the non-existence of fate.