I would say summer if preferable (my puppy came home in a November) and as others said, hanging around in pouring rain is grim.
If you inclined to shortcut taking it might be tempting to just put down pads but this is a terrible idea long term. I would say you need to focus so much on the puppy, particularly in the early months. Learn their 'looking like I need a wee' face and respond EVERY TIME. Making sure they don't eat something mad or fall down the stairs etc. It's hard going.
Also spaniels need huge amounts of stimulation. You shouldn't over exercise a pup so you can't rely on walking to wear them out, you need to be doing an hour of play and multiple short bursts of training in the day to tire them out. I have a cocker spaniel who is a dream and always has been. Partly that's just her nature but I sometimes forget how much bloody hard work I put in in those crucial months.
Pointers are beautiful but very needy dogs. We considered one but decided against it for that reason. Also do not stop training. Your job is not done when they start weeing where you want them to! Every week for 18 months we went to classes (essential for socialisation, obedience, and support!) and we still go every few weeks now she's over two.
Also you need to commit to the walks and recall. Pointers and spaniels will need roughly an hour in the morning and a hour in the evening once fully grown, and usually a midday wee break / short walk. Also there are no days off so if you ever want a lie in get your family into the dog walking routine too! They need off lead walking to stay fit and happy so unless you plan to spend your evening in a field crying at the sight of your rapidly disappearing dog you need to spend A LOT of time recall trying with these breeds.
Crates are great when used properly (read up on dos and don'ts) ours loves hers and retreats to it if she gets fed up of friends grabby toddlers when visiting people.
Sleep with your dog in the same room at first until they are confident in your home. Ours sleeps in her own bed in our bedroom but my previous family dogs have slept in the kitchen.
Keep a routine, keep them active and stimulated, get them well socialised early on and accept that there are no days off! But they are worth it so just mentally prepare yourself and enjoy!