15th January 2020, Sheffield; the Beeb (and all other sources I’ve checked) suggesting a peak temperature of 12 or 13°C* this evening. I think I can recall a single night over the last two or three months during which there was a mild frost.
Are you worried yet? Because you fucking well should be.
[ * Edit: I initially mistyped the temperatures as higher — 15 or 16°C — than they were. I’d argue that the lower, truer forecasts are not a lot less worrying. ]