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The closest I have seen to that was after 9 days of -20C (-4F) temperatures, which also froze the surface of some large rivers here in Scotland. Warmer than that and the ice doesn't seem to grow ...
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#1: Attribution notice removed
by
System
·
2020-05-27T11:08:41Z (almost 4 years ago)
Source: https://outdoors.stackexchange.com/a/3747 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/