def sensacio_termica(df):
    df1 = df[(df['V_VENT_MITJ'] >= 5) & (df['V_VENT_MITJ'] <= 7)]
    s1 = df1['TEMP_MITJ'] - 2.5
    s1 = s1.rename('STERM')
    return s1 

def rafegues_vent(df):
    gb = df.groupby('DIR_VENT')
    mvent = gb['V_VENT_MAX'].max()
    return dict(mvent)