Guelph Snow Day Predictor & Calculator
Will UGDSB close tomorrow?
The Upper Grand District School Board covers far more than Guelph city — Orangeville, Fergus, Elora, Erin, Shelburne, Grand Valley, and all of Wellington and Dufferin counties fall under UGDSB. When UGDSB closes, all 65 schools across this entire region close simultaneously. Rural county roads in Dufferin County — not Guelph city streets — typically drive the closure threshold.
One critical distinction for Guelph families: the University of Guelph makes completely independent closure decisions from UGDSB. A university closure does not mean K-12 schools are closed. snowdayprediction.ca predicts UGDSB K-12 closures only — check uoguelph.ca directly for university announcements.
UGDSB Announcement Window
By 6:00 AM
Check at 9pm for an early read and again at 5am for the final pre-announcement probability. UGDSB announces by 6:00 AM — covers Guelph, Orangeville, Fergus, and all of Wellington County.
University of Guelph Snow Day — Independent from UGDSB
Searched 340+ times per month in Guelph — and the answer matters.
U of G Makes Independent Closure Decisions
The University of Guelph makes completely independent closure decisions from UGDSB. A University of Guelph closure does not mean Guelph K-12 schools are closed. A UGDSB closure does not mean the University of Guelph is closed. The two institutions use different criteria and different decision-makers. Check uoguelph.ca directly for university closure announcements — do not assume a K-12 closure means campus is closed or vice versa.
This Predictor Covers K-12 Schools Only
snowdayprediction.ca predicts UGDSB K-12 school closures — elementary and secondary schools across Guelph, Orangeville, Fergus, and all of Wellington and Dufferin counties. University students at U of G should check uoguelph.ca directly. Parents of K-12 students should check ugdsb.ca or @ugdsb on Twitter.
Bottom line for Guelph families: K-12 students check ugdsb.ca. University of Guelph students check uoguelph.ca. These are two completely separate institutions with independent closure decisions.
Guelph School Boards — UGDSB & Wellington Catholic
Two school boards serve Guelph and Wellington County — both cover the entire region and almost always align on closure decisions.
Upper Grand District School Board
UGDSB covers Guelph, Orangeville, Fergus, Elora, Erin, Shelburne, Grand Valley, and all of Wellington and Dufferin counties — 65 schools across a vast geographic area. Rural Dufferin County route conditions drive the closure threshold.
Wellington Catholic District School Board
Wellington Catholic DSB almost always aligns with UGDSB — both boards monitor the same road conditions. Always verify at wellingtoncdsb.ca or @WellingtonCDSB directly.
UGDSB covers all of Wellington and Dufferin counties: If you live in Orangeville, Fergus, Elora, Erin, Shelburne, Harriston, Mount Forest, or surrounding communities — this snow day predictor applies to your school. All 65 UGDSB schools close simultaneously when a closure is called.
Verify Here When the Announcement Drops
Always verify from official sources — predictions update hourly but announcements are final.
UGDSB Snow Day Predictor — Orangeville, Fergus & Wellington County
UGDSB covers the entire region. One predictor serves all communities.
Orangeville Snow Day Predictor
Orangeville and all of Dufferin County fall under UGDSB. Orangeville sits at higher elevation than Guelph and typically receives more snowfall. Dufferin County routes are frequently the trigger for board-wide closures. Use this predictor for Orangeville school closures.
Centre Wellington Snow Day Predictor
Fergus, Elora, and all of Centre Wellington Township fall under UGDSB. Rural Centre Wellington routes between Guelph and Orangeville are exposed to winter conditions before urban roads. When UGDSB closes, all Centre Wellington schools close simultaneously.
Shelburne & North Dufferin
Shelburne, Grand Valley, and northern Dufferin County communities fall under UGDSB. These communities sit at the highest elevation in the board's coverage area and receive the most snowfall — their routes are the first declared unsafe and often trigger the board-wide closure.
One predictor covers all of Wellington and Dufferin: Whether you are in Guelph, Orangeville, Fergus, Elora, Shelburne, or Grand Valley — snowdayprediction.ca Guelph Snow Day Predictor applies to your school. UGDSB makes one decision for all 65 schools.
Guelph & Wellington County Snow Day Patterns
Why UGDSB closes more than Toronto boards despite Guelph's moderate snowfall.
Dufferin County Sits Higher — Closes Faster
Orangeville and Shelburne sit at significantly higher elevation than Guelph city, receiving 20 to 30% more snowfall in the same storm event. Roads in northern Dufferin County ice faster and receive lower plowing priority than Guelph arterial roads. UGDSB transportation assessors check Dufferin County routes from 3am on storm mornings — these routes, not Guelph city streets, set the closure threshold.
County Roads Drive Board-Wide Decisions
UGDSB covers vast rural territories between its communities — county roads connecting Guelph to Fergus, Fergus to Orangeville, and Orangeville to Shelburne are long rural routes that are far more vulnerable to winter conditions than city streets. A storm that leaves Guelph manageable can make Wellington Road 18 near Elora or County Road 109 near Grand Valley impassable.
Alberta Clippers & Freezing Rain
Guelph and Wellington County receive consistent snowfall from Alberta clippers tracking northeast across the Great Lakes. These systems produce 10 to 20cm events several times per winter. Freezing rain from systems tracking up the St. Lawrence valley also occurs several times per winter — even 5mm of ice on rural Wellington County roads can trigger a full UGDSB closure.
Guelph vs Ontario — School Closure Comparison
UGDSB averages 6 to 8 school closure days per year — more than Toronto (3 to 5) and comparable to Kitchener (6 to 8) and Hamilton (6 to 8). Guelph city itself receives moderate snowfall, but UGDSB's large rural footprint and Dufferin County elevation push closure frequency above what Guelph weather alone would suggest.
What to watch for in Guelph: Overnight forecasts showing 15cm+ of snowfall or a freezing rain warning are the primary UGDSB closure signals. If the forecast is marginal for Guelph city but shows heavier accumulation toward Orangeville or Shelburne, prepare for a closure — Dufferin County conditions drive the decision. Check snowdayprediction.ca at 9pm and again at 5am.
Guelph UGDSB Snow Day History
Historical UGDSB closure data — what storms actually closed Wellington County schools and why.
Notable UGDSB Closure Events
The last major UGDSB closure was January 17, 2022, when an Alberta clipper deposited 20cm across Guelph and Wellington County. UGDSB typically closes when UGST cancels buses region-wide, when overnight snowfall exceeds 15cm, or when freezing rain accumulates on rural county roads.
Alberta clipper deposited 20cm across Guelph and Wellington County. UGDSB closed all 65 schools. Rural Dufferin County routes near Orangeville and Shelburne declared unsafe by 4am.
Freezing rain deposited 7mm across Wellington County. UGDSB closed. Rural Centre Wellington roads declared unsafe while Guelph city streets remained drivable — illustrating how rural routes drive the decision.
18cm on February 12 followed by freezing rain on February 13. UGDSB and Wellington Catholic both closed both days. Highway 6 north of Guelph declared unsafe. Demonstrates how successive events compound closure risk.
Worst Guelph winters on record for school closures
2007–2008 · 2013–2014 · 2021–2022 — these winters produced the highest number of UGDSB closure events, with 2013–2014 notable for both heavy snowfall events and back-to-back closure days across Wellington County.
Last Notable Guelph Storm Event
UGDSB and Wellington Catholic both closed. 20cm across Wellington County — rural Dufferin County routes near Orangeville and Shelburne declared unsafe by 4am.
Tracking Guelph closures since launch — this card updates after each recorded closure event.
Guelph & Wellington County Road Conditions
Highway 6 · Highway 10 · Wellington Road 18 · Dufferin County Road 109
Highway 6 north of Guelph toward Fergus, Highway 10 through Orangeville, and rural Wellington and Dufferin county roads are the key corridors monitored by UGST and UGDSB assessors. When these routes show ice or closure warnings on 511on.ca alongside a UGST cancellation, a full UGDSB school closure is very likely.
What Do Guelph Parents Think?
Will UGDSB close tomorrow? Cast your vote — resets daily at midnight.
Community vote — not a prediction. Check the probability gauge above for the algorithm-based forecast.
Guelph Snow Day Tips for Parents
UGDSB-specific advice based on how Wellington County school closures actually work.
Watch the Orangeville Forecast — Not Just Guelph
Orangeville and Shelburne sit at higher elevation and receive more snowfall than Guelph. If the forecast shows heavier accumulation toward Dufferin County while Guelph looks marginal, prepare for a closure — Dufferin County routes drive the UGDSB decision. Check the forecast for the entire UGDSB coverage area, not just Guelph city.
University of Guelph ≠ UGDSB
University of Guelph and UGDSB make completely independent closure decisions. A U of G closure does not mean K-12 schools are closed and vice versa. Always check your specific institution — ugdsb.ca for K-12, uoguelph.ca for university. Never assume one decision implies the other.
Y108 FM Is the Fastest Local Source
Y108 FM and CBC Radio One 89.1 FM receive UGDSB notifications simultaneously with the board website. Radio announcements often reach Guelph and Wellington County families faster than checking websites during high-traffic storm mornings.
Check at 9pm and 5am
The 9pm check gives you an early read to arrange backup childcare. The 5am check — just before UGST and UGDSB assessors report in from Dufferin County routes — gives you the most accurate pre-announcement read. UGDSB announces by 6:00 AM.
Wellington County & Nearby Cities — Snow Day Predictor
Snow Day FAQ — Guelph & UGDSB
Guelph questions about UGDSB school closure decisions and University of Guelph.
What school board serves Guelph?
The Upper Grand District School Board (UGDSB) serves public schools in Guelph, Orangeville, Fergus, Elora, Erin, Shelburne, and all of Wellington and Dufferin counties. All 65 UGDSB schools close simultaneously when a closure is called.
What time does UGDSB announce school closures?
UGDSB announces by 6:00 AM. The fastest sources are Twitter @ugdsb and ugdsb.ca. Y108 FM and CBC Radio One 89.1 FM also broadcast closure announcements from 6:00 AM.
Does the University of Guelph close when UGDSB closes?
No — the University of Guelph makes completely independent closure decisions from UGDSB. A University of Guelph closure does not mean K-12 schools are closed, and a UGDSB closure does not mean the University of Guelph is closed. Always check uoguelph.ca directly for university closure announcements.
Does UGDSB cover Orangeville?
Yes — Orangeville and all of Dufferin County fall under UGDSB. When UGDSB closes, Orangeville schools close simultaneously with Guelph. The snowdayprediction.ca Guelph Snow Day Predictor applies to Orangeville, Shelburne, Grand Valley, and all UGDSB communities.
Why do Guelph schools sometimes close when city roads look fine?
UGDSB covers rural Wellington and Dufferin counties where roads receive lower plowing priority. A storm that leaves Guelph city streets manageable can make county roads near Orangeville, Shelburne, or Centre Wellington impassable. UGDSB makes one closure decision for all 65 schools — rural route conditions, not Guelph city streets, set the threshold.
What triggers a UGDSB school closure?
Rural route conditions in Dufferin and Wellington counties are the primary trigger. When UGST cancels buses region-wide, UGDSB almost always closes all schools. Snowfall above 15cm overnight and freezing rain warnings are the most reliable closure signals. Dufferin County routes near Orangeville and Shelburne are the first to be declared unsafe.