A region-by-region read on what The Weather Network's three-month outlook means for wildfire zones, harvest schedules, ski hills and storm risk this autumn.
The El Niño fall forecast released by The Weather Network on September 9, 2026 points to a milder and, in many regions, drier autumn across much of Canada, with the arrival of consistent winter weather pushed later than usual. The three-month outlook covers September through November and attributes the pattern to a Pacific warming event that several forecasters believe could rank among the strongest on record.
“Winter is probably going to wait on the sidelines for a while,” senior meteorologist Doug Gillham said in an interview about the outlook. September and October will still deliver the familiar back-and-forth between warm stretches and sharp, stormy cool-downs, he said — but the seasonal balance is expected to tip toward the mild side as the fall deepens.
Why a Potentially Record-Strength El Niño Is Holding Winter Back
El Niño describes shifting patches of unusually warm water in the Pacific Ocean, a pattern that reorganizes weather systems worldwide. According to Gillham, it is the main driver behind this year’s Canadian outlook.
Its practical effect on Canada is threefold: the storm track slides south of the border, milder Pacific air floods in, and the ability of frigid Arctic air to plunge southward is limited. The likely result is fewer classic fall storms, a softer start to winter and fewer Atlantic hurricanes. Globally, the picture is far less benign — the outlook notes the phenomenon is set to push temperatures that are already elevated by human-caused climate change even higher, raising the risk of severe flooding, drought and extreme heat in some regions into 2027.
“It’s not all doom and gloom for the fall in Canada,” Gillham said, while stressing that an event of this magnitude carries genuine forecast uncertainty.
“Fewer Storms Doesn’t Mean” Weaker Storms, Forecasters Warn
The clearest caution in the outlook is aimed at complacency. A quieter-than-normal storm count is not the same as a low-impact season, and Gillham was explicit about the distinction.
“Don’t be lulled into a sense of, ‘oh we’re just going to have a dry fall and we don’t have to worry about any storms.’ Fewer storms doesn’t mean that the storms that occur won’t pack a punch,” he said. An unprecedented El Niño, he added, could introduce surprises the models have not accounted for — which matters for municipalities, insurers, farm operators and anyone whose planning assumes a predictable seasonal ramp.
British Columbia’s Wildfire-Weary Interior Still Needs Rain
British Columbia’s break from summer heat came earlier this year than in recent seasons, but the reprieve is not expected to translate into meaningful moisture. Warmer and drier conditions are forecast to dominate the remainder of September and push into October.
That offers little comfort to interior communities worn down by repeated wildfire seasons. “The rest of September into the beginning of October is not good news in that we need more rain than we’ve seen,” Gillham said. Along the coast, precipitation is expected to edge closer to normal as the season progresses. Winter’s start is expected to be delayed provincewide, although alpine terrain may run cold enough for a reasonable opening to ski season.
Prairie Harvest Gets Breathing Room Before Consistent Cold
Across Alberta, Saskatchewan and Manitoba the theme repeats: mild temperatures dominating, punctuated by occasional shots of cold. Most of the Prairies lean drier than normal, with near-normal precipitation expected in southern Saskatchewan and southern Manitoba.
For producers, the timing detail matters more than the temperature anomaly. Stormy weather has already slowed the start of harvest in some areas, but the outlook suggests the usual deadline pressure is absent this year.
“The good news is that our backs aren’t up against the wall with the impending arrival of consistent winter weather,” Gillham said. “Some years, we’ve seen winter weather show up in September and then it kind of takes over. That is not the concern this year.”
Ontario and Quebec: Typical Fall First, Then a Drier Turn
Central Canada is forecast to see broadly typical fall weather through the rest of September and into October, with high-impact storms still in the mix — as recent Ontario thunderstorms demonstrated — though possibly fewer of them than normal.
A drier pattern is then expected to establish itself later in the fall and hold into November. That could be welcome in places such as Ottawa and Niagara following a summer of record rainfall. On winter’s arrival, Gillham was blunt about Ontario and Quebec: “We do not expect consistent cold or early winter weather as we wrap up the fall season.”
Atlantic Canada’s Quiet Hurricane Season Comes With a Warm-Ocean Caveat
The subdued hurricane season is expected to continue in Atlantic Canada. The qualifier is significant, however: it takes only one storm to reshape a season.
Very warm Atlantic Ocean temperatures mean any system that does track toward the region could hold onto its intensity and moisture load rather than weakening on approach. Regionally, the outlook calls for near-normal precipitation and temperatures, with consistent wintry weather starting late.
Region-by-Region Fall Outlook at a Glance
| Region | Temperature | Precipitation | Winter onset |
|---|---|---|---|
| British Columbia | Warmer than normal | Drier through early October; nearer normal on the coast later | Delayed; alpine ski season may still start decently |
| Prairies (AB, SK, MB) | Milder, with occasional cold shots | Mostly drier; near normal in southern SK and southern MB | Not expected early |
| Ontario & Quebec | Typical fall, trending mild | Drier later in fall into November | No consistent cold expected by season’s end |
| Atlantic Canada | Near normal | Near normal | Late start to consistent wintry weather |
| Northern Canada | Warmer than normal; near normal in western Yukon and parts of Baffin Island | Not specified | Not specified |
What “Normal” Means Now: A 1991–2020 Baseline and 2.4 C of Fall Warming
Seasonal outlooks are expressed as departures from a baseline, and the reference point itself has moved. The Weather Network’s forecast measures against the 1991–2020 period rather than an older mid-century average.
That distinction carries weight. Average fall temperatures across Canada are now roughly 2.4 degrees warmer than in the mid-20th century, driven by the burning of fossil fuels. A season described as “typical” today would have registered as unusually warm within living memory — which is why a mild-sounding outlook can still coincide with drought stress, extended wildfire risk and shifting agricultural windows.
Northern Canada Warms as the Arctic Heats Three Times Faster
Northern Canada is expected to run warmer than normal this fall, with the exception of near-normal temperatures in western Yukon and parts of Baffin Island. That sits inside a longer-running trend: Canada is warming at nearly twice the global average rate, and the Arctic at roughly three times.
A recent federal scientific assessment projects that under current climate policies Canada’s average temperatures would rise by five degrees, with Nunavut’s winters potentially more than 10 degrees Celsius hotter by the end of the century. Those findings echo the conclusions summarized in Canada’s Changing Climate Report for 2026, which framed a portion of the warming already locked in as irreversible on human timescales.
Why a Mild Fall Still Matters for Planning
A delayed winter reads as good news in a headline, but it redistributes risk rather than removing it. Several groups have concrete reasons to watch this outlook closely:
- Wildfire agencies and interior B.C. communities: a dry September and early October extends the window in which fire remains a live threat.
- Grain and oilseed producers: the absence of an early winter shutdown gives more room to finish a harvest that started slowly in some areas.
- Municipal and emergency planners: fewer storms with undiminished intensity is a harder scenario to staff for than a steady procession of moderate systems.
- Ski operators: alpine B.C. and Alberta hold better prospects than Ontario and Quebec, where no early or consistent cold is anticipated.
- Coastal Atlantic communities: a quiet season still leaves exposure to a single high-moisture storm fed by unusually warm ocean water.
The outlook was published by The Weather Network on September 9, 2026 and covers the three months to the end of November. Seasonal forecasts describe probabilities across broad areas, not conditions on any given day, and readers making operational decisions should continue to rely on short-range official forecasts and local emergency advisories.
Frequently Asked Questions
Does a mild fall guarantee a mild winter across Canada?
No. The outlook covers September through November and points to a delayed start to consistent winter weather; it does not forecast the full winter season, and forecasters flagged added uncertainty because of the unusual strength of this El Niño.
Why does El Niño make Canadian falls milder?
It shifts the storm track south of the Canada–U.S. border, draws milder Pacific air across the country and restricts cold Arctic air from plunging south, according to senior meteorologist Doug Gillham.
Does “fewer storms” mean lower storm risk this season?
Not necessarily. The outlook explicitly warns that a reduced storm count says nothing about the intensity of the storms that do form, and very warm Atlantic waters could sustain any system tracking toward the East Coast.
What baseline is the forecast compared against?
Normal is defined using the 1991–2020 period. Because Canadian fall temperatures are already about 2.4 degrees warmer than the mid-20th century, “near normal” today reflects a warmed climate rather than a historical average.
