(Dujon) Doesn't the record actually say that the maximum temperature each day reached 100°F for 161 consecutive days. I can't believe that it stayed above 100°F all night, every night. That has happened very occasionally in the Sahara (and probably elsewhere) in high summer but is very rare.
At the moment a temperature of 5°C would be nice. It hasn't been that high since last Sunday week and it's been down to -7°. White Christmas? No thank you. That white stuff is cold and stops you getting about.

[Rosie] As usual here in the channel we have missed the worst of it. A sprinkling last Thursday which caused mayhem on the roads and now the sun is shining and its about 7C.

Yeah. White (near-)Christmases aren't all they're cracked up to be. Though we've had some crunchy goodness here, so I've not been sliding around too much on it.

[Rosie] Possibly so, but I don't really know and thus accept the data. In Dec./Jan. 1988/9 or thereabouts I spent four or five weeks in a place called Hillston. That was a dreadful period. At a guess I'd say that I experienced 14 days of overnight temperature above 100ºF. I shall check and report back should I find any objective observations.

(Dujon) I looked at OZBOM, an excellent site, and it confirmed that it was the maxima that were all over 100°F. I suspect the minima were mostly 25° to 30°. In the last few years Adelaide has had a record high minimum of 34°C. To get a minimum of 100°F (37.8°C) you really need quite a stiff breeze to stop the lowest layers cooling and becoming decoupled from the circulation. You get a sandstorm thrown in for good measure, of course. The only place that doesn't seem to need this condition is Death Valley, where there have been several well-authenticated instances of the night minimum being above 110°F. Glad I'm not the weather observer there, or in Ojmjakon, Siberia, January mean -50°C. Yes, fifty. Wrap up well, as my Mum used to say.