My co-worker from St. John's says the best time of year there is late August, early September. I've been in late June (wet and chilly) and late August (awesome sunny warm weather).
Maybe you should see if you can come for the Soiree? I don't know what the date for that is but its a heck of a shindig....
'01 Suzuki DR650 (Patsy Q), '11 VW Golf TDI Wagon
'....and I shall baffle you with cabbages and rhinoceroses in the kitchen, incessant quotations from "Now We Are Six" through the mouthpiece of Lord Snooty's giant, poisoned, electric head. ' from My Pink Half of the Drainpipe by Bonzo Dog Doo Dah Band.