(at around 51 mins) Johnny and Nancy go into a restaurant to eat. It had been raining outside. The number and size of the wet spots on Johnny's shoulders change several times while they are seated at the table.
Inspector Koch (Lee J. Cobb) sets his coffee on the mantle and goes to light Nancy Hobson's (Evelyn Keyes) cigarette; in the next POV from the mantle, the coffee is gone.
When Johnny and Nancy arrive at the airport, the exterior shot has rain coming down at two distinct angles.