How to put THSW index on website

Internet Custom Templates and Scripts
1

HI

J would like to know how to put THSW index on website. On my web is temp “feel like”, but it is wind chill not THSW, for me more imoprtant is THSW. Is it some posiiblity to change it.?

my web http://bestpalm.pl/pogoda/

regards
Marek