But growth is expected to slow sharply this quarter in the wake of a string of devastating hurricanes.
The April-June expansion in the gross domestic product -- the economy's total output of goods and services -- is up slightly from a 3 per cent estimate made a month ago, the Commerce Department reported today.
It is the strongest performance since the economy grew at a 3.2 per cent pace in the first quarter of 2015. The upward revision reflected larger farm stockpiles.
The revised figure was the government's third and final look at GDP for the April-June period, and left GDP rising at an average 2 per cent pace over the first six months of the year. That matches the lacklustre average annual growth rates seen since the recovery from the Great Recession began in mid-2009.
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Economists at Macroeconomic Advisers believe that growth in the current quarter could tumble by as much as 1.2 percentage points due to hurricanes Harvey, Irma and Maria.
Economists at Moody's Analytics have estimated that hurricanes Harvey and Irma will end up costing in total around USD 167 billion when taking into account property damage and lost economic output. That estimate would put the two storms together close to the total devastation in 2005 caused by Hurricane Katrina, the most expensive natural disaster in US history.
Top forecasters with the National Association for Business Economics expect the economy will grow a modest 2.2 per cent in 2017 and 2.4 per cent in 2018.
In the final look at second quarter GDP, the government said that consumer spending, which accounts for nearly 70 per cent of economic activity, grew at a solid 3.3 per cent rate in the spring, unchanged from the initial estimate.
Business investment in equipment was also unchanged from the previous estimate, posting a solid increase of 8.8 per cent at an annual rate.