Back on treadmill?

The temperature changed almost dramatically from freezing to this annoying 30F. The annoying part is explained by the slippery snow and soon-to-be sleet and ice. Both of the latter suck and that's it. Yesterday I thought that I felt tired and so I ran only once. Today I was even more tired, and thus, I punished this body twice (with a core workout).

For tomorrow I have planned a tempo run, but after the micro-level climate change I'm not so willing to hit the slippery roads. Fortunately, there is always the treadmill (dislike), which also might might ease the hiding injury on my left achilles/ankle/heel.