Earlier in the session, yields on 10-year notes touched 3.022 percent, the highest since late May. US 30-year yields also hit a four-month peak of 3.159 percent, while 2-year yields soared to 2.799 percent, the strongest level in 10 years.
Yields subsequently slipped from their highs and at one point traded lower on the day.
"A four-month high, a 3 percent yield: that brought in some buyers," said Kim Rupert, managing director of global fixed income at Action Economics in San Francisco.
"That 3 percent yield on the 10-year has been a tough nut to crack and that's still the case and there's still enough global uncertainty, especially with trade issues," she added.
White House economic adviser Larry Kudlow said on Monday the United States is ready to negotiate a trade deal with China whenever Beijing is prepared for serious talks that will reduce tariffs and eliminate non-tariff trade barriers.
But China's economic reforms were moving in the wrong direction, he noted, and the United States would soon announce tariffs on an additional $200 billion worth of Chinese goods, Kudlow said at the Economic Club of New York.
President Donald Trump said later that he will announce his latest plan on China's tariffs after the market closes, according to a Bloomberg reporter on Twitter.
In afternoon trading, US 10-year yields were last at 2.992 percent, from 2.994 percent late on Friday.
US 30-year yields were at 3.135 percent, from Friday's 3.132 percent.
On the short end, US 2-year yields last traded at 2.782 percent, unchanged from Friday.
Yields had risen earlier on Monday amid growing expectations the Federal Reserve could raise interest rates a few more times this year after recent data showed wages spiking last month, elevating concerns about inflation.
Data showed US wages in August posted their largest annual increase in more than nine years, rising 0.4 percent and lifting the annual increase in wages to 2.9 percent in August, the largest gain since June 2009.
The Fed's recent rhetoric has also turned hawkish, analysts said.
"We've been tracking a nuanced shift in Fed communication where FOMC (Federal Open Market Committee) members who previously leaned dovish in their communication are growing some talons and are not only signaling hawkish intentions, but knowingly doing so without an anticipation of upside inflation risk," said BMO Capital Markets in a research note on Monday.