The 20-year-old Trout is the first Angels rookie to garner the award in consecutive months and the first overall since the Tigers' Brennan Boesch accomplished the feat in May and June 2010.
Trout continued to light up opposing pitchers to the tune of a .372 (42-for-113) average with seven doubles, a triple, three home runs and 16 RBIs last month. The all-around talent also swiped 14 bases and scored 27 runs in 26 games.
"It's a pleasant surprise only with the fact that you see very few guys come up and do this much," manager Mike Scioscia said of Trout's immediate impact this season. "Is it surprising that Mike Trout's talent is able to produce what's happening on the field? No, that's not a surprise. He's an extraordinary talent."
He led all rookies in runs, hits, batting average, on-base percentage and slugging percentage and led all Major Leaguers in hits, steals and runs scored and finished behind only the Reds' Joey Votto in batting average.
Trout, who was hitting .339 with nine homers, 33 RBIs and 22 stolen bases entering play Monday, will also be making his first Major League All-Star appearance next Tuesday in Kansas City.