Passes for what?
I usually don't like things like NY City Passes.
The best way to explore NYC is on foot. Most sights are free, and you don't need a pass for. A combination of the subway and walking is the best way to get around.
January will be cold, and you probably don't walk to sit on a red double decker bus!
I've been to New York three times and always explore on foot/by subway. However, if you want to visit attractions such as the Empire State Building, Top of the Rock and any of the tours (by no means only bus tours but Radio City, NBC Studios, Ellis Island, Madison Square Gardens amongst many others) it can be useful to use a ticket such as the NY Pass. These attractions are not free to enter. As far as I recall, we could also hire bicycles and other unusual things, all within the price.
When we visited in the snow we were grateful for the heating provided by indoor attractions; similarly in July we appreciated the air conditioning.
Of course, it is up to individuals to decide whether they will get value for money out of it. We certainly did because we were always on the go!
We looked into buying the various passes when we went to NY in 2011 (and are going again this July), but didn't really feel as if we would get sufficient value from them.
That said, the Smart Destinations website will also let you customise passes so that you only pay for the attractions you want, and they tend to be valid over a longer time period (for 30 days rings a bell). We did buy these when we visited Boston (we visited the Science Museum, Aquarium, Prudential Skywalk and had a DUKW Tour) which saved us some money and also let us skip the queues at the Aquarium and Science Museum.
NY is quite easy to walk around being on a grid system, so it is quite difficult to get lost. We did buy a 72 hour all-loops bus pass which we made good use of - we got to see most of Manhatten plus Brooklyn, Harlem, and also saw the city by night, and felt that this was good value (although it is possible to travel around for much less using the Subway, but then you don't get to see the sights!!)
Passes for what?
I usually don't like things like NY City Passes.
The best way to explore NYC is on foot. Most sights are free, and you don't need a pass for. A combination of the subway and walking is the best way to get around.
January will be cold, and you probably don't walk to sit on a red double decker bus!
it is COLD in january....really really...
on the up side, cold weather keeps criminals off the streets (when we lived there, we felt the safest in the dead of winter)..
it's of course harder to walk around in the winter, but if you really bundle up, you can do it...i used to walk to work in the winter (from 72nd and the park to rockefeller center)...it's doable....bring a warm coat, gloves, hat, scarf, boots and you're good to go...
new york is a walking town....you get the most out of it if you stay above ground......
by the way, when you say "we" are going to new york - who's 'we'?
young? old? somewhere in between?