Export commodity prices rose another 1 per cent last month, as measured by ANZ's index. The index is now 6.5 per cent above its low last July in world price terms.
Whole milk powder prices rose 2 per cent, the fifth successive monthly increase, to reach an eight-month high.
Beef is up 4 per cent to its highest level since March and cheese prices are also the highest they have been for eight months, ANZ economist Steve Edwards said.
Seafood prices are at a six-month high. "Sawn timber prices rose to a 2-year high," he said.
"At the other extreme, lamb prices eased to a 31-month low and the price of venison eased to a 22-month low."