The former Burnley chief saw his side win four times and draw their other match to secure promotion to the Championshp.
And that achievement saw Howe awarded April's award ahead of Doncaster's Brian Flynn and Yeovil boss Gary Johnson.
"It is definitely an award for the whole team; not just the players but the staff around us", Howe told the club's official website.
"It's a really nice award and it's come at a nice time of year, so there is no worry about the next game in terms of a curse!
"It is a really fitting award for all the players under the most extreme pressure at the key time of the season. They put a run together that was ultimately decisive for us."
Cherries midfielder Harry Arter missed out on April's player of the month gong, losing out to Oldham forward Matt Smith.