A snow cave will be right around freezing, 32F 0C. You don't want it to be much warmer or it will melt! So if you have gear that you can be comfortable in at that temp. than the snow cave will be great. It will get you out of the wind which could be huge. And if you are not rubbing against the ceiling there should be no falling snow, so you might be drier as well.
You can make a snow cave into a drifted area on a side of a hill, dig a hole horizontally into the drift then dig up to make your cave. It is best to have the door down low the cold air doesn't flow in. Just deep snow on flat ground is not the best, at least here in northern Canada the snow is too light. You can build a quincey. Shovel the snow out of an area then shovel snow back in and make a huge mound. Disturbing the snow will make it setup. Wait for 30 to 60 minutes and down low dig in your door, then hollow out your mound, if you push small sticks in from the outside (about 4 to 6 inches long) you will know when to stop as you hit the end of a stick. This disturbed snow will setup and be quite strong. We have climbed up and stood on top of the quincey the next morning after we slept it it (it's too much work to risk wreaking it when you need it) and it did not cave in, it was a 4 inch thick snow dome 9 feet across and held us up.
You can use a pack etc. to block the door to help keep the cold out. The ceiling will get a little wet, melty, icy as the temp gets a little above freezing, if its a smooth dome shouldn't drip much. It was this temp in our quincey and it was -40 outside.
You can make a snow cave into a drifted area on a side of a hill, dig a hole horizontally into the drift then dig up to make your cave. It is best to have the door down low the cold air doesn't flow in. Just deep snow on flat ground is not the best, at least here in northern Canada the snow is too light. You can build a quincey. Shovel the snow out of an area then shovel snow back in and make a huge mound. Disturbing the snow will make it setup. Wait for 30 to 60 minutes and down low dig in your door, then hollow out your mound, if you push small sticks in from the outside (about 4 to 6 inches long) you will know when to stop as you hit the end of a stick. This disturbed snow will setup and be quite strong. We have climbed up and stood on top of the quincey the next morning after we slept it it (it's too much work to risk wreaking it when you need it) and it did not cave in, it was a 4 inch thick snow dome 9 feet across and held us up.
You can use a pack etc. to block the door to help keep the cold out. The ceiling will get a little wet, melty, icy as the temp gets a little above freezing, if its a smooth dome shouldn't drip much. It was this temp in our quincey and it was -40 outside.