That would be ideal - agreed in all point! Oktoberfest is in September every year simply as of the weather - more here (Source: Oktoberfest.de):

Why does the Oktoberfest start in September?

The original horse-race was an event that only took one day. Over the decades, as the horse-rave had disappeared, the Oktoberfest got longer and longer, until it lasted two weeks, as it does today. However, it is not uncommon in Bavaria for the weather to become quite cold in the middle of Oktober and there can even be snow. To avoid a snowy Oktoberfest, the decision was made to start the Oktoberfest earlier, usually some time around the beginning of the fourth week of September.