2.1.0 weatherstyle.css missing in zip?

I am missing weatherstyle.css in the zip file.
Do we still need that file?
Can the old weatherstyle.css be used or has it been updated?

weatherstyle.css is only required if you use the Cumulus style template gauges-ssT.htm , and if you are using the Cumulus templates you will have the CSS file anyway. For WD I would expect you to use the new gauges-ss-basic.htm file, this does not require the weather style.css file.

If you still require it, the CSS file has not changed since it was last included.