Owu won it following a tight competition from David Abagna of Wa All Stars and Joseph Paintsil of Tema Youth.
He pipped his opponents to the award, following his sensational form in June in which he registered four clean sheets in four matches.
His 88th-minute penalty save in Tarkwa helped the Miners to beat Medeama SC at the T&A Park where he was also named the MVP.
His record with Ashgold in the said month:
1. AshantiGold 3-0 Ebusua Dwarfs
2. Medeama SC 0-1 AshantiGold
3. AshantiGold 3-0 Inter Allies
4. Hearts of Oak 0-1 AshantiGold
He will be presented with a Nasco Elite Q6 mobile phone by NASCO Electronics.