No those temps are not safe, is your case ventilated enough (what case are you using)? Maximum safe temp for i5-3570k is 67.4°C (source, intel site: http://ark.intel.com/products/65520).
Make sure you have a rear fan in your case and a front fan. Don't put your PC in a cabinet (I'll lol if you did this). If the temps are still that high, get a coolermaster hyper 212 EVO.