Kenya is a relatively small producer of coffee but its beans are much sought after by roasters to blend with those of lower quality from other producing countries.
The benchmark grade AA sold at $121-$328 per bag, compared with $181-$385 last week, NCE said after the auction on Wednesday.
Grade AB coffee fetched $107-$263 per bag compared with last week's $125-$283.
The average price for all the 23,164 bags of coffee offered was $181.87 per bag, compared with $237.33 per bag for the 4,842 bags offered last week.