Halloween Outlook: An Eerily Quiet Halloween With Spine-Chilling Temperatures for Southern Ontario

As we approach the spookiest day of the year, the last week of October has been full of tricks weather-wise from a late-season terrifying tornado last Friday and some frightful flurries over the past few days. Now, we’re happy to report that it appears Mother Nature has decided to stop with the tricks (for at least one day) and is going to treat us with fairly good weather on Halloween by Ontario standards. Although, you might want to consider adding some additional layers to the costume this year because temperatures across the region will be quite wicked with some parts of Central and Eastern Ontario dipping below the freezing mark during Trick-or-Treating hours.

There isn’t much to talk about with the weather across Southern Ontario on Halloween which is a good thing. So we’ll focus on the biggest story which is the colder temperatures. As mentioned, those through the higher elevations of Central and Eastern Ontario including Northern Muskoka, Algonquin Park, Bancroft and Petawawa will see temperature flirt with the freezing mark likely ending up around -1 to -3°C. Factoring in the ghoulish wind chill, it’ll feel closer to -5°C. The rest of Southern Ontario (except for those around the lakeshore) will see temperatures in the low single digits between 0 to 5°C. And finally, regions around Lake Ontario, Huron, Erie and Georgian Bay will see temperatures in the mid to upper single digits ranging from 5 to 8°C.

Just because Mother Nature has decided to treat us on Halloween doesn't mean she’s not hard at work brewing up a spooky start to November. That’s because we’re monitoring the potential for lake effect snow late Sunday into Monday off Georgian Bay and Lake Huron. It’s looking slightly weaker than a few days ago with a smaller timeframe, but it’s still possible that many areas will see their first impactful snowfall of the year with between 5-10cm and locally up to 15cm through Ontario’s Snowbelt. More details on that will be coming soon.

IMPORTANT: If you do plan to go out to celebrate Halloween, please be sure to adhere to all health guidelines surrounding COVID-19. This includes maintaining social distancing at all times, wearing a mask (costume masks DON'T count) and only getting together with people from your household. Health officials also recommend that those in Ottawa, Peel, Toronto and York Region to NOT participate in door-to-door Trick-or-Treating. Stay home and celebrate in other ways. Click HERE for more information from the Government of Ontario on how to stay safe during Halloween.