International dairy prices have fallen by 1.1 percent at Fonterra's global auction.
It is the sixth consecutive month of decreases in the Dairy Trade index.
The average selling price was $US3,950 per tonne.
A total of 38,174 tonnes was sold, up by nearly 1.5 tonnes on the previous sale.
Prices for whole, skim and butter milk powder all fell, as did prices for cheddar. The cost of butter and rennet casein rose.