If you planning to travel to Thornbury Harbour, Blue Mountains, Ontario, Canada, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 11:59 AM. The temperature feels like 41.35 with a humidity level of 81 so dress accordingly. Cloud coverage is 85 percent with visibility at 11 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling northwest at a speed of 14 MPH. At the end of the day don’t miss the sunset at 10:09 PM.