The temperature was up to about three degrees above zero, Fahrenheit, when I went out to grill this noon. I actually prefer that sort of temperature, if I'm going to be standing around for a while. When it's closer to the freezing point, ice and snow under my feet are more likely to melt, and standing in near-freezing water is colder, in my experience, than standing on dry frozen snow and ice.
A degree or two above zero, Fahrenheit, but it's still good to grill. (December 13, 2009)
Anyway, I got the burgers grilled - it took a bit longer, with more flame, than when it's in the nineties - and seem to have regained the knack for winter grilling.
They were done - but not burned to a crisp.