Essex County
Windsor is the southernmost city in Canada and the mildest of the Ontario pages, so ice and slush usually matter more here than snow depth. The estimate below is loaded with live Windsor forecast data.
Live Windsor forecast estimate
Enter a location to compare tomorrow's snow, ice, temperature, wind and morning timing.
Local conditions
Windsor sits at the southwestern tip of Ontario, surrounded by water on three sides: the Detroit River, Lake St. Clair and the western end of Lake Erie. That position, combined with its southerly latitude, keeps the city milder than the rest of the province through most of the winter. Precipitation frequently arrives at temperatures close to freezing, which means freezing rain, sleet and wet slushy snow rather than the deep dry accumulation seen further north. Surrounding Essex County is flat, open agricultural land with no shelter, so wind is a persistent factor.
What actually drives a decision
With temperatures hovering near freezing, ice is the most likely disruptive outcome. A glaze cannot be plowed and makes roads, sidewalks and bus steps hazardous immediately. Check whether the snow-and-ice factor cites an icing signal rather than accumulation, and read the minimum temperature against forecast rain.
Wet snow and rain during the day followed by a clear, colder night produces widespread black ice by the morning run with no new precipitation at all. This pattern is one of Windsor's most common winter transportation problems.
The county's unsheltered farmland lets wind cut visibility and drift snow across rural roads. Because accumulation is often modest here, wind and ice tend to be the operative hazards rather than snowfall depth.
Windsor sees less severe winter weather than most of Ontario, so equipment and practice are calibrated to a lower baseline. That is an operational reality rather than a criticism, and it means an unusual event can produce more disruption here than an equivalent event further north.
The forecast for the coordinates above is scored against six weighted factors: snow and ice, temperature, wind chill, morning timing, area and routes, and school level. Around Windsor the rows that most often carry the number are temperature, snow and ice. Every factor appears in the result with its own value, score bar and published weight, so a percentage is never presented without the reasoning behind it. The methodology page documents each threshold, and the accuracy and limitations page sets out what the model cannot observe.
This site does not publish closure thresholds for any school system, because those are operational judgements rather than published numbers. What it can do is point you at the organisations that actually decide. Around Windsor, ON those include:
Treat the estimate on this page as a reason to prepare and to keep checking, never as an announcement. A school system can close buildings, delay the start, cancel transportation only, dismiss early or move to a different learning format, and those outcomes are not interchangeable.
Primary sources for weather warnings and road conditions covering Windsor. School decisions still come from the systems listed above.
Windsor questions
The estimate reads the forecast at Windsor's coordinates. The Greater Essex County and Windsor-Essex Catholic boards announce closures and transportation cancellations by zone, and in an ice event the position can change between an evening notice and the early-morning update.
It is Canada's southernmost city and is surrounded by water on three sides. Both factors keep temperatures closer to freezing, so precipitation more often falls as rain, freezing rain or wet snow rather than accumulating dry snow.
More often than elsewhere in Ontario, yes. Windsor's marginal temperatures mean the snow-and-ice factor is frequently triggered by its icing signal rather than by accumulation, and the factor row names which of the two produced the score so you can check instead of guessing.
The two cities are adjacent and share a weather pattern, but they are in different countries with different school systems, different alert providers and different road authorities. This page requests Windsor's own coordinates and links to Canadian sources.
Milder average conditions mean fewer disruptive events, not none. Local equipment and practice are calibrated to that lower baseline, so an unusual ice storm or a heavy wet snowfall can have a larger practical effect here than the same event would further north.
Still deciding what to do with the number? Read how schools make the final call and the guide to the best times to check a forecast.