Mortgage rates in the U.S. rose to the highest levels this year as job growth gained momentum.

The average rate for a 30-year fixed mortgage was 3.86 percent, up from 3.75 percent last week and the highest since Dec. 31, Freddie Mac said in a statement Thursday.

The average 15-year rate climbed to 3.1 percent from 3.03 percent, the McLean, Virginia-based mortgage-finance company said.

Borrowing costs tracked an increase in yields for 10-year Treasurys, which climbed last week after the Labor Department reported that 295,000 jobs were added in February and the unemployment rate fell to 5.5 percent, the lowest in almost seven years.