I drove my previous 911 ('86 3.2) in most conceivable conditions in my area (rain, light snow, heavily tore up roads, heavy stop and go traffic, subzero temps, etc). The car just didn't care what the weather was doing. It always started, always ran perfect, etc, and I had over 100,000 on it when I sold it.
The 915 tranny got tiresome in heavy traffic after a few years, but the G-50 cars will be better in that respect. The salt used in this area ate the car up pretty well too (due to the prior owner using it all winter - my winter use was limited). It took quite a bit of work to keep the Guards Red shiny as well since the car took a lot of abuse cosmetically (exterior) from the prior owner.
These cars are built like tanks and if well maintained, can go a long time.
Jay
90 964