You won't want to do that.
1) it "withstands" snow and ice in the sense of "not being destroyed by". However snow and ice will still flatten the fence while they're there, so that it is not a meaningful fence during those times. Wet snow or ice can also ground the fence out, so that it is no longer electrified (and will KILL the battery of your fencer, unless you're using a plug-in unit)
2) unless you get the more expensive pos-neg fencing, it won't work well (potentially not at all) in snowy conditions or significantly frozen ground.
3) I would strongly not suggest using it as your main defense against predators. First, because all electric fence fails *sometimes*, and predators can be pretty quick to notice; and secondly because it is only a "sorta" defense anyhow, not really all that comprehensive or totally-protective. It works best for rotational grazing, or for rough protection vs dogs/coyotes in an area that is ALSO protected by OTHER means as well (permanent perimeter fencing, or guard animals, or etc).
4) also it won't work in a circle, you need angles and straight lines so you can tie the corner posts back to prevent it from sagging too badly in the wind.
Overall, I would totally not suggest doing it. Electronet DOES have its uses (I'm using some right now, in fact
), but this is NOT one of them
Sorry, good luck, have fun,
Pat