Apparent temperature

Setup, Configuration and Use Scripts & Rules
8

I have now the solution. Thanks for your help:

rule "set Outdoor_FeelTemp"
when
 Item Outdoor_Temp changed or
 Item Outdoor_Feuchte changed
then
    var Number Temp = Outdoor_Temp.state as DecimalType
    var Number Humity = Outdoor_Feuchte.state as DecimalType

    var Number T = Temp * 9/5 + 32
    var Number RH = Humity
    var Number HI = 0;

    if(T <= 40.0) {
        HI = T
    } else {
        HI = -42.379 + 2.04901523*T + 10.14333127*RH - 0.22475541*T*RH - 0.00683783*T*T - 0.05481717*RH*RH + 0.00122874*T*T*RH + 0.00085282*T*RH*RH - 0.00000199*T*T*RH*RH

        if (RH < 13 && T >= 80 && T <= 112) {
            var adjust = ((13-RH)/4)  * Math.sqrt(17-Math.abs(T-95)/17)
            HI -= adjust
        } else if (RH > 85 && T >= 80 && T <= 87) {
            var adjust = ((RH-85)/10) * ((87-T)/5)
            HI += adjust
        } else if (T < 80){
            HI = 0.5 * (T + 61.0 + ((T-68.0)*1.2) + (RH*0.094))
        }
    }

    var Number FeelTemp = (HI - 32) * 5/9

    postUpdate(Outdoor_FeelTemp,FeelTemp)
end