Calgary · Alberta · 2026–27 season
Snow Day Predictor CalgaryWill school be cancelled tomorrow in Calgary?
Live overnight forecast for the City of Calgary, including the downtown core, the northwest, northeast, southwest, and southeast quadrants, plus Airdrie, Cochrane, and Chestermere. The predictor tunes to Calgary Board of Education and Calgary Catholic decisions, with Rocky View Schools bus cancellation probability returned separately.
Multi-model forecast, five-factor closure engine, province-aware results. No sign-up, no tracking of your queries.
What makes Calgary unique
Calgary experiences more chinook events than any major Canadian city, with rapid temperature swings of 20 °C or more in a single day. The Calgary Board of Education and Calgary Catholic SD operate through conditions that close schools across coastal British Columbia.
Calgary Region forecast
Calgary snow day forecast, what to expect this winter
Calgary sits at 1,045 metres of elevation on the eastern slope of the Rocky Mountains, a setting that produces the most volatile winter weather of any major Canadian city. The chinook arch, a band of clear sky to the west, can lift temperatures from −25 °C to +10 °C in a matter of hours as warm Pacific air descends the lee side of the Rockies. The same week can deliver Arctic outflow with wind chills below −40 °C, then a Rocky Mountain spillover snowfall, then a thaw. Annual snowfall averages around 130 cm, but the city rarely holds snow on the ground for long, the chinooks see to that. The forecast for any given school day depends on which of these patterns is dominant overnight.
School operations in Calgary are split between the Calgary Board of Education (CBE), the largest public board in Alberta with more than 130,000 students, and the Calgary Catholic School District. Both boards have a high tolerance for cold and snow, a function of Calgary’s long winter, well-equipped families, and an Alberta culture that treats −20 °C as ordinary. CBE and Calgary Catholic make closure and bus cancellation decisions independently, though they often align on the most severe mornings. The boards typically post their calls by 6:00 am, ahead of the morning commute. Rocky View Schools, covering Airdrie, Cochrane, and Chestermere on the city’s edges, makes a separate decision and cancels more frequently than the urban boards due to longer rural bus routes.
For most Calgary families, the practical question splits two ways. School buildings rarely close, even at −35 °C with wind chill below −45 °C. School buses, however, are cancelled multiple times each winter, particularly when the morning forecast combines fresh snow, freezing fog, or extreme cold. Our forecast returns both probabilities, and the bus-cancellation number is usually the more useful one for parents in the CBE and Calgary Catholic networks. For Rocky View Schools families in the outlying communities, the closure probability climbs more steeply with the same conditions.
School boards
Calgary school boards we model
The boards and transportation operators that make the morning closure call for Calgary.
- Calgary Board of Education (CBE)
The largest public board in Alberta with over 130,000 students across more than 240 schools. Rarely closes buildings outright; bus cancellation decisions are posted to cbe.ab.ca by 6:00 am on weather days.
- Calgary Catholic School District
The Catholic counterpart to CBE, serving roughly 60,000 students across Calgary, Airdrie, Cochrane, and Chestermere. Closure calls typically align with CBE but are made independently.
- Rocky View Schools
Public board serving the surrounding rural areas including Airdrie, Cochrane, Chestermere, Crossfield, and Beiseker. Cancels buses more frequently than the urban boards due to long rural routes.
- Conseil scolaire FrancoSud
French-language public board serving southern Alberta. Operates separate transportation and may make different calls on the same day as CBE.
Bus transportation
CBE and Calgary Catholic each contract their own bus operators rather than using a joint consortium. Closures and bus cancellations are made independently by each board, typically posted by 6:00 am the morning of. Buses are cancelled more often than buildings close, particularly when overnight temperatures fall below −30 °C or when fresh snow combines with strong winds. Rocky View Schools makes a separate transportation call covering Airdrie, Cochrane, and Chestermere routes, and FrancoSud operates its own bus network.
Local weather
Calgary’s signature winter weather patterns
The phenomena that produce most Calgary snow days.
- Chinook winds
Warm, dry westerly winds that descend the lee of the Rockies and produce rapid temperature swings of 20 °C or more in a single day. Calgary records more chinook days than any other major Canadian city. A chinook can melt 30 cm of snow within hours and turn a school closure forecast into a regular day by 7:00 am.
- Arctic outflow
Cold air drainage from the Northwest Territories and northern Alberta, often producing surface temperatures of −30 °C with wind chills below −45 °C. These cold snaps last three to seven days and are the most common trigger for CBE bus cancellations, particularly when extreme cold warnings are in effect at the 6:00 am decision window.
- Rocky Mountain spillover snowfalls
Pacific moisture lifted over the Continental Divide spills onto the foothills and the city, depositing 15-30 cm of snow over 12-24 hours. These events affect Cochrane, the southwest quadrant, and Bragg Creek most heavily, with accumulation tapering eastward toward Chestermere.
- Bow River cold-air drainage
On clear, calm nights, cold air pools along the Bow River valley through downtown Calgary, with temperatures in the river corridor running 3-5 °C colder than the surrounding plateau. This produces freezing fog and ice fog that complicates morning bus routes through the inner city even when the wider region is clear.
- Late-season spring storms
Calgary regularly sees significant snowfall into April and May, occasionally past Victoria Day. Spring storms combine wet, heavy snow with temperatures hovering near freezing, conditions that down tree limbs and power lines but rarely close schools.
History
Notable Calgary snow days in recent winters
Storms and ice events that shaped how Calgary school boards approach the morning call.
Polar vortex extreme cold
February 2019A multi-day polar vortex incursion drove Calgary wind chills below −45 °C for more than a week. CBE moved to modified operations with bus cancellations and a recommendation to keep students indoors at recess; Calgary Catholic followed the same pattern. The event is the modern benchmark for Calgary cold-weather school operations.
Unusual early-season snowstorm
October 2, 2022A Colorado low tracked north over the foothills and dumped 20-30 cm of wet snow on Calgary in early October, well before the city had transitioned to winter operations. Bus routes were cancelled across CBE and Calgary Catholic; tree damage was extensive across mature inner-city neighbourhoods.
Edmonton-Calgary corridor extreme cold
January 2014A persistent Arctic outflow held the Edmonton-Calgary corridor below −30 °C for ten consecutive days, with wind chills near −45 °C. CBE cancelled buses on multiple mornings; engine block heaters became mandatory across the city’s fleet.
Early-season storm
November 2018A November storm deposited 25-35 cm of snow on Calgary over 36 hours, combined with 50 km/h winds. Bus routes were cancelled across CBE, Calgary Catholic, and Rocky View; Deerfoot Trail and Stoney Trail saw multiple closures.
Pre-Christmas extreme cold
December 22, 2022A sharp Arctic outflow drove Calgary to −37 °C with wind chill near −50 °C on the final day before the Christmas break. CBE and Calgary Catholic cancelled buses; the City of Calgary opened emergency warming centres. Conditions moderated within 48 hours under a strong chinook.
Mid-winter chinook reversal
February 2020A textbook Calgary chinook lifted temperatures from −28 °C to +12 °C in under 18 hours, with the chinook arch visible from across the city. A school closure forecast issued the night before was cancelled by sunrise, the kind of forecast reversal that defines Calgary winter operations.
FAQ
Calgary snow day frequently asked questions
The 7 questions Calgary parents and teachers ask us most.
Will Calgary Board of Education close tomorrow?
Type your Calgary postal code or "Calgary, Alberta" into the predictor above. The Calgary Board of Education (CBE) rarely closes its school buildings for weather alone, even during extreme cold warnings or moderate snowfalls. The more common signal is a bus cancellation, posted to cbe.ab.ca by 6:00 am the morning of. Both probabilities, closure and bus cancellation, are returned in the result.
What is a chinook and how does it affect Calgary schools?
A chinook is a warm, dry wind that descends the eastern slope of the Rocky Mountains, raising Calgary temperatures by 20 °C or more in a matter of hours. Chinooks frequently reverse a forecast overnight, turning what looked like a snow day into a clear, mild morning. For school operations, a chinook arriving before 5:00 am will typically cancel any planned bus cancellation; one arriving at 9:00 am has no effect on that day’s schedule. Our predictor models the chinook signal explicitly when westerly winds and rising pressure are forecast.
Why does Calgary operate through −30 °C when other cities close?
Calgary has a deeply ingrained cold-weather culture. Block heaters are standard, schools are well insulated, students are expected to dress for the conditions, and the city’s plow fleet is sized for a long winter. CBE and Calgary Catholic generally only cancel buses when the morning wind chill is below −40 °C or when fresh snow combines with cold. By contrast, a Vancouver or Victoria district will close at −5 °C with a centimetre of snow, because their fleets and student wardrobes are not set up for cold.
Will school be cancelled in Airdrie or Cochrane tomorrow?
Schools in Airdrie, Cochrane, and Chestermere are served by Rocky View Schools (rockyview.ab.ca), which operates independently of CBE. Because Rocky View covers long rural bus routes, it cancels transportation more frequently than the urban Calgary boards on the same weather morning. Calgary Catholic also operates schools in Airdrie and Cochrane and may align with either Rocky View or CBE on any given day. Enter the specific community in the predictor for a tuned forecast.
Does Calgary Catholic SD always close with CBE?
Not always. Calgary Catholic and CBE consult on major weather days but post their own decisions independently, and there are mornings when one cancels buses and the other does not, particularly in marginal conditions. Both boards aim to have their call posted by 6:00 am. The predictor returns a single probability tuned to the historical decision pattern of both boards.
How does Calgary winter compare to Edmonton?
Edmonton sits 300 km north of Calgary and is colder on average, with a longer winter and more consistent snow cover. Edmonton does not benefit from chinooks the way Calgary does, so its cold snaps last longer and its snow accumulates rather than melting and refreezing. Calgary winters are more variable, with bigger temperature swings and faster transitions; Edmonton winters are more uniformly cold. Both Edmonton Public Schools and Calgary Board of Education share a similarly high tolerance for cold-weather operations.
Will French FrancoSud schools close with CBE in Calgary?
Conseil scolaire FrancoSud operates French-language public schools in Calgary and across southern Alberta, with its own transportation contracts and decision process. FrancoSud often aligns with CBE on severe mornings but can make a different call, particularly for longer regional bus routes feeding Calgary from outlying communities. Check csfrancosud.ca for the official call; our predictor returns a Calgary-tuned probability that broadly applies to all four boards on the same morning.
Near Calgary
Nearby Alberta cities
Other Alberta cities our forecast covers — same regional profile, different local weather.
Looking for forecasts across the rest of Alberta? View the Alberta hub with all school boards, transportation consortia, weather zones, and a full city directory. Or browse the provinces & territories hub for every Canadian region.
Also in Alberta: Medicine Hat · Fort McMurray · Grande Prairie
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