I play the pro V1x year round independen tof weather. Any ball will feel harder in the cold, but the Pro V is still the best perfroming ball there is.

In cold weather, you'll want to play a lower compression golf ball. I have been suggested by others to try the Titleist DT TruSoft for those types of conditions

I used to change balls during cold season. Up here in the high desert, the temps can be in the 30's and mostly 40's in the early morning. The choice I went with at the time (one winter) was Titleist Velocity- an even harder ball than Pro V1 (I think), but I got the added distance.

In the last few years, I just stayed with Pro V1 all year round. Yes, in the cold weather without the humidity and heat that helps the ball travel longer, I just have to adjust to it with the same ball rather than adjust to something else that may have other characteristics that I'll need to adhere to temporarily.

All I want to say is that it's a better and easier adjustment for me throughout the year with the same ball... it's like more organic? ...just my two cents.

At 45-65 degree F weather, I would continue playing my Pro V1 or Pro V1x. It will continue to be your best performing ball regardless.

Where I am, we are currently experiencing colder temps of -5 C / 24 F, and I have switched to a softer compression ball like the Titleist NXT Tour S. It is softer and more affordable than my Pro V1x's. I also prefer it to the TruSoft as it seems to have better greenside performance and control.

Disclaimer - we are not actually playing with temps of -5 C/24 F, as the greens and fairways are frozen for the time being -- we will start playing again next week when temps warm up to 1-2 C/35 F and everything thaws!

Two bladed answer. I would play the ball that I played with all summer but the other side is, does your course have a lot of leaves in the fall and winter that you could easily lose your ball. If you are playing a premium ball like the ProV, that could get expensive unless you play previously owned ProV's like I do. Winter golf to me is just staying in touch with the game due to cold weather. Fairways are wetter thus little ball roll, you are bundled up hindering your golf swing so I do not expect too much out of my game so losing a lesser golf ball than the ProV does not sting as much.

I am not a fan of changing golf balls during the Winter. Obviously no one is going to hit a ball the same distance as they do in the Summer months but when you change balls you're completely changing the characteristics of how the ball performs. Knowing exactly what a ball is going to do with a full shot is important but knowing what it's going to do with your short game is paramount. Golf is a very difficult game so why make it more difficult.

I think we benefit from a ball with more spin, since the cold air seems heavier and our swing speeds are lower, the slightly additional spin helps the ball climb and stays in the air longer. I'm currently using the Pro V1. Most of the distance loss comes from the longer irons & woods, as I only tend to lose a couple yards with my wedges. IMO