According to bankrate.com

About 1 month ago, we posted that the rate was at 4.45%. The pullback can be partly explained by mixed economic signals, specifically the employment picture and the labor participation rate. Also the severe weather we are experiencing this winter is having an impact on many businesses. The Fed continues to taper which puts some upward pressure on rates, but has signaled it will not do so at the cost of a recovery.

Treasury yield curve from Yahoo Finance.