UPDATE 1-China aluminum production at lowest since April 2016

(Adds details, milestone)

BEIJING, Sept 14 (Reuters) - China's primary aluminum production fell for a second successive month in August to its lowest level since April 2016, as capacity cuts continued to affect supply, official data showed on Thursday.

Aluminum output fell 3.7 percent year on year to 2.64 million tonnes last month, which was also down from 2.69 million tonnes in July, according to data released by the National Bureau of Statistics..

The August number is the lowest monthly total since production of 2.57 million tonnes in April 2016, the data showed.

In the first eight months of the year, China produced 22.17 million tonnes of aluminum, up 6.1 percent from the same period last year.

China's overall non-ferrous output was down 2.2 percent year on year at 4.42 million tonnes in August. This was down from 4.47 million tonnes in July 2017 and the lowest since July 2016.

January-August nonferrous production was up 4.9 percent at 36.4 million tonnes. (Reporting by Tom Daly; Editing by Richard Pullin)