The biggest percentage fall came from anhydrous milk fat, which dropped 7.2 per cent to an average of US$4736/MT, after a 3.8 per cent drop two weeks ago.
This is the second time the commodity has sat below the US$5000/MT threshold in two years, and the lowest since January 2021.
Butter and butter milk powder both experienced 3.3 per cent declines - with an average of US$4595/MT and US$2529/MT respectively.
Cheddar, which has bounced around in value a lot in the past few events, bucked the trend with a 3.8 per cent increase, to an average of US$4167/MT.
23,828 MT of product was purchased by 117 successful bidders, significantly less than the 26,795 MT and 122 winning bidders last time.
On Monday, Fonterra lowered its forecast farmgate milk price for the 2022/23 season from a range of $8.20 - $8.80 per kilogram of milk solids (kgMS) and a midpoint of $8.50, to a new range of $8.00 to $8.60 kgMS and a midpoint of $8.30.
Its forecast 2022/23 normalised earnings guidance is in a range of 55 to 75 cents.