The police only allow it at Dale for well behaved clubs - they did allow it for Leeds, Sunderland, Newcastle, and Tottenham who all seemed to know how to behave at football. They'll never allow it for Oldham
They have spent a kings ransom rebuilding the drains and the pitch at Spotland in recent years. If it stops raining heavily at around 1am as forecast I'd predict it will then drain and the game will be on. Dale won't want this moved to a Tuesday night as they have sold a lot of tickets