mountain-forecast.com — Mountain weather forecasts for over 11300 mountain summits around the world. Detailed 6 day hill, mountain and summit forecasts for up to 5 different elevations per mountain. The comprehensive weather resource is aimed at climbers, mountaineers, hillwalkers, hikers or outdoor enthusiasts planning expeditions where mountain weather is critical.

weatheroffice.gc.ca — From Environment Canada.  Find out whether you'll be rained upon or shone upon.  (Since surely you'll go, rain or shine.)