Fortunately, I think the answer to that question is most likely to be "no", but with caveats.
There will be a low pressure system that will be tracking southeast across Ontario and New England over the weekend. Friday looks nice as there will be a slight high pressure ridge that will provide plenty of sunshine and comfortable temperatures. Clouds will increase on Saturday as the system approaches. The big question is when showers and storms associated with the cold front will move through. Right now, the most likely scenario is that there are some scattered showers and storms around late Saturday afternoon, with the best rain chances coming after dark Saturday evening. I have a 30% chance of rain during the day on Saturday, but I'd put the chances of rain on Saturday night closer to 60%. Of course, this timing is subject to change as we get closer to the weekend, so stay tuned for updates.
The cold front is expected to move through early Sunday morning, so most of the day should be very nice, with decreasing clouds and temperatures near 80 degrees. It will be a bit breezy behind the front, with a northwest wind at 10 to 15 mph, and gusts to around 20 mph at times.