Mother Nature Casts a Chilling Spell Over Ontario With Spooky Temperatures & Snow on Halloween

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Can you feel the eerie chill in the air? It's not just because Halloween is a mere 24 hours away. The wicked witch that is Mother Nature is casting a chilling spell over Ontario, wrapping us in cold temperatures and ghostly snow.

Come Halloween morning, some regions might find so much snow that it'll take more than a mere broomstick to clear those tombstones. Lake effect snow around Lake Superior, Huron, and Georgian Bay might pile up a ghastly 5-15cm by daybreak. The Sault Ste Marie area might even see a haunting 25cm!



As noon approaches, the snow will retreat into the shadows. Expect temperatures to peak in the low single digits in Southern Ontario and plunge a few degrees below freezing in the North.

But don't be fooled! The lake effect snow bands will rise again, zombie-like, by late afternoon, driven by a southwesterly flow. This could ensnare the Grey-Bruce and Parry Sound regions in heavy wet snow and blinding conditions by dusk.


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Late in the evening, the winds will change course, pushing snow bands from Lake Huron and Georgian Bay southwards. There might be a sudden, frightful burst of snow between 9 PM - 2 AM in Simcoe County, Exeter, and the Grand Bend area.

Some accumulation is possible overnight into Wednesday in Grand Bend, Meaford, and Collingwood. We'll have more on that in an upcoming forecast!


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If any ghosts and goblins are venturing out for treats, they'll face bone-chilling temperatures across Ontario.

Early evening temperatures will range from -5°C in the northwest to 5°C around Lake Erie and the Niagara region. In Southwestern Ontario and the GTA, temperatures will hover just above freezing.

It'll be equally bone-chilling further north in Central and Eastern Ontario, with temperatures near freezing. Higher elevations in Central Ontario and throughout Northern Ontario will see below-freezing temperatures.


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Northwestern Ontario might even experience -5°C, the night's coldest spot.

From the Instant Weather team, we wish you a thrilling (yet safe) Halloween! Bundle up and keep cozy!

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