Friday night, I skied in the Arb after a day with a high near 40 degrees F. The snow was mush; in many spots (such as south-facing hills), I sank an inch into the snow every time I pushed off. And there were quite a few spots where grass was poking through thinned snow cover. I went 10km in about 51 minutes, and felt like I'd skied 40km.
Tonight, I skied in the Arb after a day with a high under 20 degrees F, a few millimeters of snow, and a stiff west wind, which dropped the temp to -5 by the time I was out. The snow had crusted over, with many spots being nothing more than ice. I went 15km in 1:01, and the biggest problem was keeping my skis and poles out of the ruts and holes.
If it's not too late, I'd like Santa to deliver six inches of fresh snow for Christmas.