Open, 2º at 6:15am and sunny. A sunny day forecast with a temperature of 24º. All trails are open, 25 km, and freshly groomed. This is the day, the best skiing of the year.
Carry a knapsack. If you overdress you can carry your extra clothes.
When Nordic skiing we all warm up quite a bit. So that makes it a great sport for cold weather (No chairlift). Sweating does happen. A dry shirt to wear for your second lap and/or to wear home is really nice.