Not sure about the Boeing but the Bus FCOM I currently fly clearly states in the event of KNOWN or SUSPECTED windshear - delay approach or divert.
We fly approaches in gusty conditions with windshear all the time, its what makes us tough blokes, right?
But be aware that many times, myself included, you are probably leaving yourself wide open in the event of a hard landing/blown tyre/bent spar etc.
What was the forecast for PER that night. My experience with a previous airline and the one I currently operate to PER with is viz/ceiling come into flight planning and xwind must be within limits but no one considers the huge am easterlies that can totally ruin your day.