The game will be rescheduled for Sept. 20 at 1:05 p.m. as part of a split doubleheader.
All tickets for today's game will be honored at the rescheduled game in September.
The unveiling of the Harry Kalas memorial statue has also been postponed.
The ceremony has been rescheduled for Aug. 16 at 6:40 p.m., before the Phillies play the Arizona Diamondbacks.