Sudbury Snow Day Predictor — Rainbow District School Board Closure Forecast

Will Sudbury Schools Be Closed Tomorrow?

Greater Sudbury is Northern Ontario’s largest city and experiences some of Ontario’s heaviest snowfall. The city averages approximately 300+ cm of snow per year — nearly double Toronto’s annual total. Georgian Bay lake-effect occasionally reaches Sudbury’s southern edge, and the city’s position in the Canadian Shield means it sits at higher elevation and in a cooler, snowier air mass than Southern Ontario cities. Sudbury’s extensive suburban and rural geography, combined with heavily forested roads prone to drifting and blowing snow, makes bus route safety a central factor in every closure decision.

School Boards We Cover

• Rainbow District School Board — Greater Sudbury, Espanola, Elliot Lake, Massey. rainbowschools.ca | Announces: by 6:30 AM | Radio: Magic 92.7 FM, CICS 105.3 FM | Twitter/X: @RainbowSchools
• Conseil scolaire catholique du Nouvel-Ontario (CSCNO) — French Catholic board for northeastern Ontario including Sudbury.
• Conseil scolaire public du Grand Nord de l’Ontario (CSPGNO) — French public board for northeastern Ontario.
• Huron-Superior Catholic District School Board — serves parts of the Sudbury area.

Sudbury Snow Day History

Rainbow DSB averages approximately 8–12 closure days per year — among the highest rates in Ontario. The combination of high snowfall totals, exposed roads through forested terrain, and the extensive rural coverage area of the board means closures happen more frequently than in Southern Ontario. Heavy January and February snowfalls are the norm, not the exception.

When Does Rainbow DSB Announce?

Announces by 6:30 AM via rainbowschools.ca, Magic 92.7 FM, and SchoolMessenger notifications.

Nearby Communities

• Thunder Bay Snow Day Predictor — Lakehead DSB (northwest)
• North Bay Snow Day Predictor — Near North DSB (southeast)
• Ontario Province Overview

Frequently Asked Questions — Sudbury Snow Days