I am in Sydney Australia. I too selected Paris on the map but I still see imperial units. I rebooted by Pi as well. I went back to region setting and saw Paris long and lat. Selecting Sydney again is still imperial. I am using OSPI 2.18(2). Also, whilst I have in the past, I am not seeing a successful weather call time in diagnostics this morning after the reboot. There is no key in the WU field. BTW, I still see imperial when there is a successful call.
By region do you mean the map location selected in ‘Edit Options’ then yes. Please see the attached images. The coordinates are in the Sydney Australia region. As I said above, I also selected the Paris region and still see imperial. This is WEB. I just tried the App and it displays correctly in Metric.
Possibly related, but we actually received some rain here in Adelaide yesterday – not much, only about 1.1mm. However, Opensprinkler turned the water down to 0% and showed that 28mm was received – almost like it was taking the number of mm recorded, thinking it was inches; then converted it to mm?