I don’t know if anyone yet created them - but I did and so I want to share:
They are all variants of the official classic temperature icon.
Put them to
openHAB-conf/icons/classic and now you can use
<temperature_outdoor> instead of
<temperature> as icon. Rename images if my thresholds don’t fit your temperature needs
Full package: (rename to temperatures.zip after download)
temperatures.zip.txt (16.2 KB)