Today it is noticeably warmer, 20 Celsius. We actually opened the classroom windows to get it warm... and we fired up an electric kettle in our classroom to get some tea... nice to have a steaming mug in your hands during class...
Apart from that it's been grey and rainy all the time for more than a week, with only short breaks.
There's about one situation where I use non-metric units... and that's sizing iron pipes. Until today steel gas and water pipes have escaped any efforts of standardization. Austria went to metric long before WW I, but no rule without exception... ok, 1" and 2" boards are also something you'll occasionally see, but not officially.
