By Todd Buell

FRANKFURT--German industrial production increased on the month in January, as mild winter weather gave a healthy boost to the construction industry, data from the country's economy ministry showed Friday.

In adjusted terms, production increased by 0.6% on the month, beating the 0.5% gain forecast in a survey of economists by The Wall Street Journal last week. The ministry also revised up significantly the December monthly gain to 1% versus 0.1% originally reported.

-Write to Todd Buell at todd.buell@wsj.com