Whether or not you have snow on the ground this time of year makes a huge difference in the daily high temperatures. The last couple days have been perfect examples...check out the high temperatures From Wednesday. Also notice the visible satellite imagery from this afternoon. Notice how much colder it is where there is snow compared to SW of the QC where there is no snow on the ground? This is a result of snow's high reflectivity, or "albedo." This sends a lot of solar radiation back out to space before it can be absorbed by the ground (and eventually heat the atmosphere.) Not only does this effect daytime highs, but it also influences how cold a place will get at night during our long winter nights!
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