Also think about when you will get your licence. Doing your training over the winter means getting your licence in the spring with good weather to allow you to use it solo.
If you do your training in the Summer and get your licence in the Autumn then there will likely be big gaps between your flights during the winter which probably means refresher training.
As someone has said much of your initial training is done in the circuit or with an instructor and therefore can often be fitted in between the bad weather in the winter.
Another option is to go to the US and do a 3 week course in Florida or California. You would need to do some UK flying with an instructor when you get back but it can be very cost effective.
I would think that 1 flight per month isn't likely to be very helpful at all.