Be rained off
Definition 1 of 1
Pro Tip 1/3Weather Specific
Used only when rain affects outdoor activities, not other weather conditions like snow or wind. 
The outdoor yoga session was rained off unexpectedly.
Pro Tip 2/3Not a Delay
It means the event is cancelled for that day, not just starting late due to rain. 
We waited, but the match was rained off, not delayed.
Pro Tip 3/3Unplanned Cancellation
Emphasizes that the event was expected to happen but was called off because rain was not anticipated. 
The concert was rained off, disappointing the fans.