The 25-year-old has been rewarded for finding the back of the net six times from six starts in the league.
Gestede received particular plaudits for his hat-trick of headers in Blackburn's 4-2 victory over Birmingham City on April 21.
"Rudy has been a fantastic signing for us," said manager Gary Bowyer. "As a person, he is top class. He has played a massive part for the team with some very impressive performances. His goals have been the icing on the cake."
Blackburn are currently eighth in the league table.