On: Heat pumps of the 1800s are becoming the technolog...

[yaysyu]

Depends on your frame of reference but in Melbourne it can get to around 1 degree Celcius in winter (33~F). Sometimes subzero but very rarely

[PaulHoule → yaysyu]

In upstate NY it gets a lot colder than that

https://en.wikipedia.org/wiki/Syracuse,_New_York#/media/File...

the average temperature is below freezing for four months.

[fifteenforty → PaulHoule]

That actually sounds like a perfect climate for it.

[Zach_the_Lizard → yaysyu]

In my part of Texas, it gets below freezing on 12 days a year on average, but within the last two years it's been as low as 7F / -14C.

I guess that's the value of having a big heat sink, the Pacific Ocean, at your doorstep: temperatures are more stable.