While many consider Labour Day the unofficial gateway to autumn, it’s actually the Autumnal Equinox that ushers in the new season, which officially arrives on Saturday, September 22, at 9:54 p.m. EDT. But will it also usher in cooler conditions after the hot, steamy summer we had?
You’ve already read our winter forecast for Canada, but here’s a more in-depth look at what to expect for the autumn months:
Canadian Fall Forecast Overview
Overall, the Canadian Farmers’ Almanac is predicting cooler and drier weather during the fall, followed by a spell of cold and unsettled conditions in November and December.
Now that the days are growing shorter, the leaves are starting to change color. Our readers often ask if the weather has any effect on fall foliage, and while the amount of daylight is what signals the leaves to start to turn, weather does play a role in the intensity and vibrancy of colors.
Drought can affect the vibrancy of the colors you see in fall. Trees have to be in a healthy state as the season’s transition, not water stressed. Unfortunately, the weeks of hot weather across the Prairies and in British Columbia, combined with a lack of rain in some areas, may lead to less-than-vibrant colors for leaf peepers.
And we all know a good wind storm can take leaves down prematurely. Because we’re forecasting some tropical activity at the end of September and the beginning of October (see Tropical Storms, below), colorful fall foliage could be compromised.
According to the Canadian Farmers’ Almanac, we expect an active hurricane/tropical season in 2018 (which officially ends November 30th), and we believe that there will be two risks for a potential tropical storm threat for the Maritimes sometime during the last week in September, and another tropical storm threat for Newfoundland and Labrador during the first week of October.
Will Your Thanksgiving Be Squashed?
Overall, Thanksgiving looks promising for most of the country, except for the tropical disturbance that may linger over Newfoundland and Labrador, as mentioned above. All other provinces can expect a fair but chilly holiday.
Halloween Weather Tricks or Treats?
Trick-or-treaters will enjoy mostly cold and dry weather except for Newfoundland & Labrador (showers), and the Prairie Provinces (stormy), with snow showers over the Rockies. So bundle up those little ghouls and goblins!
Will Snow Fall In Fall?
Before winter officially arrives on December 21st, many parts of the country may see intermittent wintry-like conditions throughout the fall months. In fact, the month of December starts and ends with snowfall for much of Canada. Some significant storms to watch for:
- December 4-7: A storm brings strong winds and wintry precipitation to Newfoundland & Labrador;
- December 8-11: Stormy for Alberta and Saskatchewan, and heavy snow throughout the Prairies;
- December 19th – Wintry precipitation arrives for Newfoundland & Labrador, Nova Scotia, PEI, New Brunswick, Quebec, and Ontario, bringing gale force winds and heavy precipitation right through to the start of the winter season.
For a more detailed weather outlook for 2018-2019, be sure to check out our long-range weather planner online here.
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