I did a conversion, -22C is equal to -7.6F.
That freak storm we had in 2021 was -6F. So now we’re talking! I had a lamb born during that and she just looked so pitiful that I cut an arm off my sweater and made her a coat. Every time I went outside I scooped her up and stuck my finger in her mouth. It was always warm, that’s a good thing. Her mom was feeding and caring for her. But I tucked in my sweat shirt and stuck her next to my belly while I worked, just to warm her up a little. She looked so pitiful!
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So if my lambs survived -6F, yours should survive -22C. They just need a dry shelter that blocks the wind.