If you manage a commercial property in the Ottawa area, you already know winter isn’t just about how much snow falls — it’s about how unpredictable it is. This year, there’s a specific reason for that unpredictability, and it has a name: El Niño. A strong one is developing in the Pacific right now, and it’s going to shape our entire winter.
Here’s the short version: expect a milder, later-starting winter overall, but don’t let your guard down. The forecast models agree that Ottawa is sitting in a “battleground” zone this year, where storms are more likely to swing between snow, freezing rain, and rain within the same event. That’s arguably harder to manage than a straightforward cold, snowy winter.
Below, we break down what forecasters are actually saying, what it means for your property, and how to plan around it.
The Big Driver: A Historic El Niño
Every winter forecast starts with the same question: what’s the Pacific Ocean doing? This year, the answer is unusually loud.
Environment and Climate Change Canada and NOAA’s Climate Prediction Center are both tracking a very strong El Niño event, with a greater than 90 percent chance it peaks as one of the strongest on record this fall and winter. El Niño works by shifting the jet stream and pushing storm tracks around, which tends to keep the coldest Arctic air bottled up farther north for longer stretches than usual.
The Weather Network’s fall outlook picks up on the same theme, describing a milder, drier fall across much of the country as El Niño delays winter’s arrival and limits how far south Arctic air can push. For Ottawa property managers, that likely means a later start to the snow season compared to a typical year — but “later start” doesn’t mean “easier winter.”
What History Tells Us About Super El Niño Winters
Past strong El Niño winters (think 1997/98, 2015/16) tend to follow a recognizable pattern in Eastern Ontario:
- Milder average temperatures, especially in December and February
- More precipitation falling as rain or freezing rain instead of pure snow
- Sharper temperature swings, with mild stretches broken up by short, intense cold snaps
- A more active storm track through the Great Lakes and St. Lawrence corridor
That combination is exactly what forecasters are pointing to again this year.
What the Forecasters Are Saying About Ottawa Specifically
The Old Farmer’s Almanac and Farmers’ Almanac
Both almanacs single out the Ottawa-to-Toronto corridor as a region to watch closely. Their outlooks describe a winter of “dramatic contrasts” rather than one long deep freeze, with storms that hover dangerously close to 0°C. In practice, that means a single storm system could start as snow, shift to freezing rain, and then flash-freeze as colder air moves in behind it — a sequence that’s brutal on parking lots and walkways.
They also flag the Ottawa and eastern Ontario region as sitting near a snowbelt boundary, where northwest winds off the Great Lakes can still deliver bursts of heavy, localized snow even in a milder overall season.
The Weather Network
The Weather Network’s seasonal outlook echoes the “milder and drier than normal” theme for much of the country this fall, with the caveat that El Niño’s strength this year introduces more uncertainty than usual into the details. Their meteorologists have noted that an event this powerful can still produce surprises, since the historical sample of comparably strong El Niños is small.
Old Farmer’s Almanac Long-Range Outlook
The Almanac’s long-range Ottawa forecast calls for a winter that runs warmer than normal overall, with the coldest stretches concentrated in December and January. It also predicts above-normal precipitation but below-normal snowfall for the season — again pointing toward more rain and mixed precipitation events rather than consistent snowpack.
What This Means for Your Property
A “milder” forecast sounds like good news, but for anyone responsible for snow and ice management, this type of winter often creates more operational complexity, not less. Here’s why:
- Freeze-thaw cycles multiply your ice risk. When temperatures hover near 0°C, melted snow refreezes overnight into black ice — a much harder hazard to spot and manage than fresh snowfall.
- Mixed-precipitation storms require faster response times. A storm that shifts from snow to freezing rain mid-event can turn a manageable plow job into a same-day ice-control emergency.
- Fewer big snow events doesn’t mean fewer callouts. Snowbelt-driven squalls and short, sharp cold snaps can still dump significant snow with little warning, even in an overall milder season.
Practical Steps to Take Now
- Confirm your snow and ice contract covers mixed events. Ask whether your provider’s plan accounts for freeze-thaw cycles and rapid-response ice control, not just scheduled plowing after a set snowfall trigger.
- Prioritize high-traffic zones for pre-treatment. Entrances, loading docks, and accessible parking spots are where freeze-thaw ice causes the most liability exposure — and where proactive salting matters most.
- Build in flexibility for late-season activity. If the coldest stretch lands in December and January as forecast, don’t assume March is in the clear. Sharp cold snaps can still arrive outside the “core” winter window.
Frequently Asked Questions
Will Ottawa get less snow this winter? Most forecasts point to below-normal snowfall overall, but that doesn’t guarantee an easy season. Localized snowbelt squalls and short cold snaps can still produce significant accumulation with little notice.
What is El Niño, and why does it matter for winter weather? El Niño is a periodic warming of surface waters in the tropical Pacific Ocean. It shifts the jet stream and storm tracks, which in turn affects temperature and precipitation patterns across North America — including how far south cold Arctic air can push into Ontario.
When will the coldest weather hit this winter? Long-range outlooks point to December and January as the most likely windows for the coldest stretches, with milder conditions more common in November and February.
Does a milder forecast mean less risk for commercial properties? Not necessarily. Freeze-thaw cycles and mixed precipitation (snow shifting to freezing rain) tend to increase slip-and-fall risk even when total snowfall is down, because ice is harder to predict and manage than snow.
How reliable are seasonal winter forecasts? Seasonal outlooks describe general trends in temperature and precipitation over a three-month period — they’re not predictions of individual storms. Even a warmer-than-normal winter can include major cold outbreaks or heavy snow events, so it’s worth treating these forecasts as a general guide rather than a guarantee.
Sources: Environment and Climate Change Canada / ClimateData.ca, NOAA Climate Prediction Center, The Weather Network, Farmers’ Almanac and Old Farmer’s Almanac Canada 2026–2027 Winter Forecasts.
