everyone i know ride in winter, as much as possible, dual sports are amazing in winter, we ride till above 2C, and when its cold like freezing or below, only during the day when the sun is out if its chance or rain or snow, and dry roads, once snow falls, only when the roads are safe enough too, and never had an issue with black ice, and we do crazy **** in mall parking lots at night even in winter on our supermotos in -5 wet surfaces, its all dependant on how GOOD you ride, the only limit to when and when you don't ride is your skill. i know a guy who is still riding his 600 sport, and to warm up his tires, he will punch the throttle and the rear tire will naturally slip till it gets warm enough to grip, and always makes sure to serpentine till he feels comfortable. but i don't suggest you do that, he's kinda crazy fearless and has mad skillz, but he also has a supermoto and rides the mother !"£ out of it in the winter too.
winter riding is totally different from summer riding, lear all over again and you will be fine, its like the difference between fast speed control and slow speed control like in parking lots, completely two different things.