"Oi lads...soaked clean through" -Sappers
"Fuck this rain...faaaaaaauck these Jerries!" - 25pdr
"Shhh men...tommy could be lurking in this rain..." - Waffles
"Mmmmm...this rain is a nice, warm blanket of cover!" - PG
"This fuckin' rain is bullshite, captain." - Sappers
"I hate fighting in the rain..." - Volks
Most of the other good ones have already been posted. Dunno if the americans have any rain quotes.