stour > storm, driving storm (Scottish and northern dialect)
2 He was compelled to seek some refuge near, 3 And to that shed, to shroud himself from the shower,
shroud > shelter
4 He came, which full of guests he found whilere,
whilere > erewhile: a while before; hence: already
5 So as he was not let to enter there:
as he was not let > [that he was not allowed]
6 Whereat he began to wax exceeding wroth,
Whereat > At which, whereupon wax > grow
7 And swore that he would lodge with them yfere,