It works fine for me Jesse...
In[2]:= SystemInformation["Small"]
Out[2]= {"Kernel" -> {"SystemID" -> "MacOSX-x86-64",
"ReleaseID" -> "10.0.0.0 (5098698, 5098537)",
"CreationDate" ->
DateObject[{2014, 6, 29}, TimeObject[{20, 38, 32}]]},
"FrontEnd" -> {"OperatingSystem" -> "MacOSX",
"ReleaseID" -> "10.0.0.0 (5098698, 2014062704)",
"CreationDate" ->
DateObject[{2014, 6, 27}, TimeObject[{23, 17, 40.}]]}}
In[3]:= Import["ExampleData/temperatures.json"]
Out[3]= {"01/01/09" -> -6.06, "01/02/09" -> -2.83,
"01/03/09" -> -4.22, "01/04/09" -> 1.28, "01/05/09" -> -7.17,
"01/06/09" -> -4.83, "01/10/09" -> -2.33, "01/07/09" -> -2.5,
"01/11/09" -> -7.33, "01/08/09" -> -8.94, "01/12/09" -> -8.11,
"01/09/09" -> -6.78, "01/13/09" -> -8.17, "01/14/09" -> -14.11,
"01/15/09" -> -20.11, "01/16/09" -> -23.17, "01/17/09" -> -12.67,
"01/18/09" -> -9.22, "01/19/09" -> -9.67, "01/20/09" -> -8.67,
"01/21/09" -> -7.94, "01/22/09" -> -5.67, "01/23/09" -> -2.89,
"01/24/09" -> -11.78, "01/25/09" -> -15.61, "01/26/09" -> -12.89,
"01/27/09" -> -10.72, "01/28/09" -> -9.67, "01/29/09" -> -6.56,
"01/30/09" -> -10.61, "01/31/09" -> -7.61}